The Mining Magazine, Vol. 46, Index

INDEX TO VOLUME XLVI. - JANUARY TO JUNE, 1932.

A frican A sb e sto s T r u s t... 6

A frican and E u rop ean In v e stm e n t C o ... 135

A laska, C opper in ... 382

A la s k a : Geography a n d Geology o f L itu y a B a y ... 127

A la sk a , Geological Reconnaissance of the D enn ison Fork D istric t 383 A la s k a , G laciation i n ... 127

A la s k a : L a k e C lark-M ulchatn a D is tr ic t ... 192

A la sk a J u n o G old M in ing C o ... 34, 101 Alderm ac Mill (R ow e)— D ig e s t ... 309

A lexandria G old M ines ... 357

A llan, J . C., and J . L. Francis on D riv in g a M ines D rainage T u n n el in N o r th W a les, 68 and D i g e s t ... 113

A llen , E d gar, Screen ... 233

A llu v ia l.— D e p o sits, P ro sp ectin g for (W. C. G rum m itt), 347 a nd (A. F . Skerl), 213 ; D e p o sits, S y stem a tic S a m pling of, b y B an k a D rill, P. R . L ake on, 2 5 8 an d D ig e s t, 305 ; M ining w ith M echanical E x c a v a to r s (W . E. Sinclair), 15 ; V a lu a tio n , P relim inary R eport o f In stitu tio n Com ­ m itte e on ... 258

A lum in a R ec o v e r y from S ilic io u s M aterial— P a t e n t ... 383

A lu m in iu m R e co v ery from F in e ly -D iv id e d M aterial— P a te n t ... 383

A m erican Geology, B ib lio g ra p h y o f N o r th ... 192

A m erica n M in in g L a w ... 127

A m erican S m e ltin g and R efin ing C o... 96

A n alysen , Schieds-, A u sgew ahlte M ethoden fiir — R e v i e w . . . . 29

A nglo A m erican Corporation ... 200, 262 A n glo-C ontinen tal M ines ... 71

A nglo-F rench E x p lo r a tio n Co... 263

A n kerite ... 358

A p ex (Trinidad) O ilfields ... 64

A rbitration P rocedure (Edw ard H o o p e r) ... 348

A rgonau t M ine, G old M illing a t (W oodw orth)— D ig e s t 62 A risto n G old M in es (1 9 2 9 )... 7, 263 A rm ytage, K . E ., o n F lo ta tio n : S o m e O perating D e ta ils 130, 191 A rsenic M etallu rgy— P a t e n t ... 319

A sb esto s.— C h rysotile, in C anada, 63 ; M ines a t Shabani, J a c k S p a ldin g on , 130 and D ig e s t, 1 8 4 ; X -r a y S tu d y o f S tructure o f ... 318

A sh a n ti G oldfields Corporation , 7, 71, 263 ; (G. W . E a to n Turner) ... 329

A sh le y G old M ines ... 360

A s s a y o f G old, V olu m etric, W . B . Pollard o n 195, 252 A sso c ia te d T in M ines o f N igeria ... 327

A to lia M ining C o ... 318

A u stralian R o m a O il C o ... 291

B.C. S ilv e r M in e s... 100

Baker— M illing o f G old Ores— D i g e s t ... 369

B a la g M t G old M ines ... 135, 2 0 0 , 256 B a n k a D rill, S a m p lin g A llu v ia l D e p o sits b y , P . R . L ake on, 258 and D i g e s t ... 305

B arberton D is tr ic t A llu v ia ls C o... 161

Barker— Copper Sulphate P ro d u ctio n — D ig e st ... 372

B a rry-H ollinger ... 37, 102, 167, 231, 3 5 9 ■ B a tu Selangor T in D red g in g ... 72

B earings, N e w T y p e o f B all and R oller ... 362

B ea trice M ine, S elib in (E . S. W illbourn) ... 20

B en d ig o G oldfield ... 163

Bergwerksmaschinen, Lehrbuch der (H offm ann, H . an d C.)— R e v i e w ... 28

B ergw irtschaft, Lehrbuch der (K egel)— R e v ie w ... 224

B eringer, Bernard— S o m e E x p er ie n c es in E cuad or ... 279

B ern ew itz, M. W . v o n — G oldfields o f D u tc h W est B o r n e o .. . . 287

B ery lliu m .— Carbonate M anufacture— P a te n t, 319 ; D e te r ­ m in a tio n , 126 ; M etallurgy— P a t e n t ... 63

B ib ia n i (1927), L td 7 , 71 B id g o o d ... 295, 358 Bierbrauer and L u yk en — D ie F lotation— R e v i e w ... 2 8 8 B im eta llism , T . A . R ickard on ... 2

B irm ingham U n iv e r sity O re-D ressing L a b o r a t o r y ... 2

B irth d a y H onou rs ... 322

B ism u th in L ead S m eltin g — P a te n t ... 382

B la stin g a t T ild en M ine ... 1 26 B o le o , C om pagnie d u , P ra ctice a t ... 63

B o lid en .— M ine, Sw ed en , 72, 382 ; Ore D e p o s i t s ... 126

B o liv a r V enezuela ... 72

B onanza M in in g D istric t, Colorado, Geology a n d Ore D e p o sits o f 3S3 B o re-H o les.— C linom eter for— P a te n t, 252 ; E lectrica l M easu rem ents a t B o tto m o f ... 191

Borehole S u rveys, Deep, a nd Problem s (H add ock )— R e v ie w . . 350

B o y d ell, H . C., on th e T em perature o f an E p i-T herm al Ore D e p o sit, 261 and D ig e s t ... 315

Brakpan M in e s 6 , 7 0 , 134, 1 99, 262 B razilian G old ... 126

B reaking G round a t D o m e M ines (Lawrence)— D ig e st ... 61

B ritan nia M ining and S m eltin g Co... 3 5 , 1 00, 165 B ritish -A m erican T in Corporation ... 136, 3 2 8 B ritish C olum bia, L od e-G old in ... 2 9 2 , 319 B ritish Ind u stries F a i r ... 1 3 2 ,1 6 9 B ritish S o u th A frica C o ...• 9 9 , 136, 3 5 4 B ritish T in In v e stm e n t Corp< B rok en H ill A sso cia ted Sme: B roken H ill B lo ck 14 Co. B u cy ru s-E rie B ala n ced H o isl B u en a T ierra M ining . . B u en a V ista M ining Co. B u lo lo G old D redging, Ltd. Bu reau o f M in es P u b licatio n s, U .S. 97 42 320 2 2 9 163, 200, 3 28, 3 5 3 ... 253

C aliforn ia, L ocating M in era l C laim s in ... 192

Californian Q uicksilver ... 382

C a l l o y ... 1 2 8 Camp B ird G eo lo gy , H . C. B o y d ell o n , 261 and D ig e s t 315 Cam sell, Charles, on Im p erial M ineral R e so u r c e s... 194

Canadian.— G old D e v e lo p m e n ts, 3 8 2 ; In ter e st in South A frican M ining, 289 ; M inerals in the N o rth W e st (K idd)— D ig e st, 1 8 8 ; P lacer G eolo g y (Cockfield)— D ig e s t ... 313

Canadian R a d iu m M ines, L t d ... 296

C a n u s a ... 166

Cape A s b e s t o s ... 326

C arbonyls o f M etals— P a te n ts ... 1 27, 319 (3), 382 C ariboo G old Q uartz C o 3 5 , 357 Carlyle, E . J ., B e c o m es Secreta ry o f C anadian I n s tit u te 2 Carman— M ining M ethod a t Q uesta— D ig e s t ... 125

C arpenter, S ir H arold.— on a M etallographic In v estig a tio n o f N a tiv e S ilv er, 194, 252 ; R e c e iv e s I n stitu tio n G old M edal 2 58, 323 C asey Sum m it G old M ines ... 3 8 Cedar Creek M i n i n g ... 230

C em ent-G un C on trol o f L o o se G r o u n d ... 251

Central M anitoba G old M ine ... 2 9 5 C entral M ining and In v e stm e n t C orporation ... 32, 262, 326 Central P ro v in ces M anganese ... 256

C entrifugal S ep a ra tio n — P a te n t ... 126

C ham pion R e e f G o l d ... 255 C hem ical and M etallurgical C orporation ... 3 2 8 C hem istry, A Textbook o f Organic ... 2 5 2

T H E MINING MAGAZINE

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PA G E

C h ina-C lay (K a o lin ) ... 127

C hinese E n g in eerin g and M in ing Co... 8

C hlorine E lim in a tio n from Zinc C hloride— P a te n t... 382

C h rom ite.— M agm atic, 2 5 2 ; V a r ie tie s o f ... 63

Chrom ium P la tin g ... 3 1 9 Cissarz and J o n es.— Gernuin-English Geological T erm in o lo g y — R e v i e w ... 350

C ity D e e p ... 1 98, 2 5 4 , 2 8 9 Classifier O verflow s ... 382

C lem m er and Coghill— F lo ta tio n o f N o n -S u lp h id e Ores— D ig e s t ... 120

Coal.— R em o v a l of H e a v y C o n stitu e n ts from — P a te n t, 3 8 3 ; T estin g , 126 ; Trade in Q ueen sland, 34 ; T r e a t m e n t .. . . 62

Cockfield— G eo lo g y o f Placer D e p o sits— D ig e s t ... 313

Coghill and Clemm er— F lo ta tio n o f N o n -S u lp h id e O res— D i g e s t ... 120

C olum ario G old M ines, L t d ... 34

C on centration, T h e S c ien tific F u n d a m en ta ls o f G ra v ity (R . T . H a n c o ck )... 30

C oniaurym , 36, 101, 166, 2 31, 3 5 8 ; G old M illing a t *:(> çÿRedington)— D ig e s t ... 125

°C o n so lid a ted D ia m o n d M ines o f S o u th -W est A frica . . . . 135, 263 C onsolidated G old F ie ld s o f N e w Zealand ... 71

C onsolidated G old F ie ld s o f S o u th A frica ... 135

C onsolidated M ain R e e f M in e s ... 198

C onsolidated M in es S e l e c t i o n •• 200 C on solidated M in ing and S m e ltin g Co. 34, 100, 102 (2), 2 2 8 , 2 2 9 ' C ooper, W . G. G .— Terrain and T o p ograp h ical E ffects in G ravim etric S u rv ey s ... 2 8 2 Copper.— in A laska, 382 ; B e lt, N o rth ern R h o d esia , H . S chneiderhohn on , 194 and D ig e s t, 241 ; from B olid en M ine, 382 ; Converter, M essina, 191 ; D e p o sits, M ichigan, 6 2 ; D e te r m in a tio n o f T races of, 3 1 8 ; E le c tr o -H y d r o - m eta llu rg y of, 3 1 8 ; E le c tr o ly sis— P a te n t, 191 ; E le c tr o ­ ly tic R efin ing o f— P a te n t, 252 ; and G old D e p o s its in A b itib i C ou nty, Q uebec, 383 ; L ea ch in g a t U n io n M inière, 191 ; M ining, R h o d esia n , 63 ; P o s itio n in 1931, 4, 382 ; P ro cess, M urdoch, 227 ; R efin ing F u rn a ces, 191 and P a te n t, 319 ; R em o v a l o f O ccluded G ases from — P a te n t, 383 ; R e str ic tio n , 200 ; S ep a ra tio n o f V o la tile M etals from — P a te n t, 252 ; S u lphate P ro d u ction (Barker)— D i g e s t ... 372

C o p p er D e p o sits near K e a tin g , O r e g o n ... 382

C opperm ine R iv er Area M inerals (K idd)— D ig e s t ... 188

C orderoy S y n d ic a te ... 136

Crow le, P. J ., R e c e iv e s C o n solid ated G old F ie ld s M edal 258, 323 Crown M i n e s ... 253

Crushing.— Coarse, a t M ount L yell— D ig e s t, 123 ; D is tr i­ b u tion o f E n erg y in (R . T . H a n co ck ), 337 ; E x p lo siv e (D ean and G ross)— D ig e s t, 247 ; T h eo ry o f ... 382

C ryolite, D ifferen tia l F lo ta tio n of— P a te n ts (2) ... 192

C yan ide.— D e -a e r a tio n o f S o lu tio n s o f, 251 ; E ffec t o f S a lt on S o lu tio n s, 318 ; E q u a tio n s (R a m sa y )— D ig e st, 377 ; in F lo ta tio n , 382 ; R e co very P ro cess (H a m ilto n )— D ig e st 118 Cyprus and G eneral A sb esto s ... 64

D a g g a fo n te in M ines, 70, 262, 354, 361 ; H isto ry , D e v e lo p ­ m en t, e tc . (F. A . U n ger, S. E . T . E w in g , and J . L. W illey ), 2 6 5 ; W in d in g E n g in e fo r ... 318, 362 D ayd aw n (N ew G uinea), L t d ... 58

D e B eers C o n so lid a te d 7, 70, 135 D e a n an d Gross— E x p lo siv e Crushing— D i g e s t ... 247

D ew aterin g , C o n tinuous, in F iltr a tio n — P a t e n t ... 191

D ia m o n d F ield s, S h in y a n g a (Teale)— D i g e s t ... 251

D ia m o n d s near P o rt E liza b eth ... 288

D ix e y — A P ra ctical H andbook o n W a ter S u p p ly — R e v ie w . . 30

D o m e M ines, 36, 101, 166, 231, 289, 294, 3 5 8 ; G round B rea k in g a t (Law rence)— D ig e s t ... 61

D rainage Tu nn el in N orth W a les, J . L. F rancis and J . C. A llan on, 68 and D i g e s t ... 1 1 3 D red g e.— B u ck et D e v ic e , 105 ; B u ck et L o sses (T. L. W illan), 149 ; fo r K illin ghall T i n ... 126

D red g in g , G o l d ... 3g2 D rill-S teel S h a r p e n in g ... 1 9 1 D rillin g a t T ild en Mine ... 126

D rills, Sam plin g w ith H a m m e r ... 251

D r iv in g C osts ... 126

Du rb an R o o d ep o o rt D e e p ... 2 5 4 D u st.— in M ine A ir, 62 ; P r e v e n tio n ... 251

D u tc h W est B o rn eo G oldfields (M. W . v o n B e m e w itz ) , 287 ; (E . J. V a llen tin e ), 86 ; (P- M. V an B o sse ) ... 223

Earth , T he U n stable ... 319

E a st G eduld M ine. 6 , 198, 2 89, 3 54 ; and H . R . H i l l ... 73

E a st P o o l ... 256

E a s t R an d P r o p r i e t a r y 2 54, 3 8 2 E cuad or.— G o ld in (H . L . H o llo w a y ), 2 1 9 ; S om e E x p er ie n c es in (B ernard B e r in g e r)... 279

E d in b u rg h U n iv e r sity G eo lo g ica l D e p a r tm en t ... 66

E isenw esens, B eiträge z u r Geschichte des ö sterreich isch en 192 E ld o ra d o G old M i n e s ... 296

E le c tr ic P ow er a t K irkland L ake (T y r r ell)— D i g e s t ... 379

E lectrica l P ro sp e c tin g fo r A u rifero u s Q uartz V e in s and R eefs (H . H ed str ö m ) ... 201

E lectricia n 's H andbook, A m e r ic a n ... 319

E lu tr ia tio n , P n eu m a tic— P a t e n t ... 252

E m m o n s— Geology o f Petroleum — R e v ie w ... 95

E m p ire M ineral R eso u rces, 191 ; Charles C a m sell o n 194 E m p lo y m e n t A g reem en ts (E dw ard H o o p e r ) ... 3 4 8 E n g el— P relim in a ry W a shin g o f F lo ta tio n F e e d — D ig e s t . . . . 380

Engineering Geology (R ies and W a tso n )— R e v i e w ... 160

E rzen, Probenahm e von— R e v ie w ... 29

E sp era n za , L t d ... 8

E v e and K ey s— M a gnetic S u r v e y s o v e r D y k e s — D ig e s t ... 245

E w in g, S. E . T .— D a g g a fo n te in M in es Surface E q u ip m e n t, e t c . 265 E x c a v a to r s, A llu v ia l M ining w ith M ech a n ica l (W . E . Sin cla ir) 15 E x p lo ra tio n Costs and M ethods ... 625

E x p lo siv e .— Crushing (D ean and G ross)— D ig e s t, 247; L iq u id O x y g en , 3 8 2 ; T e s t i n g ... 3 1 8 F a lc o n b r id g e ... 37, 102, 167. 2 32, 2 9 5 , 3 5 9 F a ra d a y a n d H is M eta llu rg ica l Researches (H a d field )— R e v i e w ... 5

F ederal M in ing and S m e ltin g C o... 357

F iltr a tio n Im p ro vem en ts— P a te n t ... 191

F ir e a nd F la m e, A H is to r y o f ... 192

F irecla y M ining and P r o c e s s i n g ... 3 1 8 F lin F lo n , E lectrica l E q u ip m e n t a t ... 3 1 8 F lo ta tio n .— C on tact A iig les in , 191 ; C yan ide in , 3 8 2 ; D ifferen tia l, o f C ryolite— P a te n ts (2), 1 9 2 ; F e e d , P r e ­ lim in a r y W a sh in g o f (E n g el)— D ig e s t, 3 8 0 ; o f G old Ore, 3 8 2 ; o f N o n -S u lp h id e O res (Coghill an d C lem m er)— D ig e s t, 120 ; O p eratin g D e ta ils , K . E . A r m y ta g e o n , 130, 191 ; o f O x id iz e d Ores— P a te n t, 126 ; P r o c e sse s and T em perature, 6 2 ; o f P y r ite , 251 ; R e a g e n ts— P a te n ts, 126 (3), 2 5 2 ; S e le c tiv e , o f L ea d -Z in c O re s ... 62

F lo ta tio n (G audin)— R e v i e w ... 287

F lo ta tio n (M ayer and Schranz)— R e v ie w ... 94

F lo ta tio n , D ie (L uyken and B ierbrauer)— R e v ie w ... 288

France, N e w P r e sid e n t of, a M in in g E n g in e e r ... 322

F ra n cis, J . L ., and J . C. A lla n o n D r iv in g a M in es D rainage T u n n el in N orth W a les, 68 and D i g e s t ... 113

F ra n çois C em en ta tio n C o ... 322

F ren ch C reek D e v e lo p m e n t C o... 3 5 7 F rench W e st A frica, M ines and O re-D ep o sits o f ... 318

F resn illo ... 127

F r ick er ’s M etal and C hem ical C o... 384

F u se E x p er im e n ts o n th e R an d ... 32

Garland, F . J .— M odem M ech anical E q u ip m e n t in M in es . . . 344

G as.— C entrifugal C leaning— P a te n t, 191 ; E le c tr o s ta tic C leaning— P a t e n t ... 127

G ases in M etal M in es ... 126

G audin— F lotation— R e v i e w ... 287

G ed uld P ro p rieta ry ... 2 5 4 G eev o r T in M i n e s ... 72

G eldenhuis D e e p ... 134, 262 G em L ake M in es ... 38

G eneral E n g in e e r in g C o ... 118

G eneral M in ing and F in a n c e ... 198, 3 2 6 G en ter T y p e F ilte r ... 41

G eo lo g ica l S u r v e y o f S o u th A frica ... 289 P A G E

PAG E Geological Term in ology, G erm an-E nglish (Jones and Cissarz)

R e v i e w ... 350

G e o m i n e s ... 24

G eo p hysical M ethods, S tu d ie s o f ... 192

Geophysical P ro sp ectin g , 1932 ... 1 92, 319 G eo p h y sic s.— B r o u g h to n E d g e L ectu re o n , 66, 318 ; E arth R e s is t iv it y S u r v e y s in , 191 ; E le c tr ica l E q u ip m e n t for— P a te n t, 191 ; E lectrica l P ro sp ectin g fo r A u riferous Q u a r tz V e in s and R e e fs (H . H ed strô m ), 201 ; In ter­ p r e ta tio n o f R e s is t iv it y M easu rem ents in , 191 ; M agnetic S u r v e y in g in , 252 ; M a gn etic S u rv ey s o v e r D y k e s (E ve and K ey s)— D ig e s t, 2 4 5 ; “ M e g ” E a rth T e ster for, 1 0 3 ; a P lea for, in P r o sp e c tin g , 3 2 2 ; R e la tio n of, to G eology on th e G ulf Coast o f A m erica, 382 ; R esearch in , 67 ; T errain and T o p o g ra p h ica l E ffects in G ravim etric S u rveys (W . G. G. Cooper) ... 282

Geophysics, 1931 ... 319

G eophysik, H andbuch der (G utenberg)— R e v ie w 27, 351 G éophysique, T r a ité P ra tiq u e de P r o s p e c tio n ... 319

G erm an-E nglish Geological T erm in ology (Jones and Cissarz)— R e v i e w ... 350

G lobe and P h œ n ix ... 7, 135, 199 G lynn’s L yd en b urg ... 32

Gold.— B e lt, S alisb u ry (T y n d ale-B iscoe)— D ig e st, 375 ; in B razil, 126 ; in C anada, 3 8 2 ; and Copper D e p o sits in A b itib i C ou n ty, Q uebec, 383 ; D red g in g , 382 ; in E cu a d o r (H . L. H o llo w a y ), ' 21 9 ; E lu v ia l, in Transvaal, 9 9 ; F in d in Q ueen sland , 2 2 6 ; in K en y a and U ganda, A . W . G roves on, 260 ; M etallu rgy— P a te n t, 252 ; M illing at th e A rgon au t (W oodw orth)— D ig e s t, 62 ; M illing at C oniaurum (R ed in g to n )— D ig e s t, 125 ; M illing a t San A n to n io — D ig e st, 1 2 4 ; M ine, N e w G uinea (Morley)— D ig e st, 58 ; M in in g C om panies freed from T a x a tio n of D iv id e n d s in V icto ria , 227 ; M ining in R ou m an ia, 382 ; Ore F ind s, C on servation of, 251 ; Ore, F lo ta tio n of, 382 ; Ores, M iffin g o f (Baker)— D ig e s t, 3 6 9 ; P lacer, in B.C., 3 8 2 ; Placer, in F ren ch E q u a to ria l A frica, 191 ; Pro­ d u ctio n , F u tu r e , 252 ; P rosp ectin g , 191 ; P ro specting in M alay and D u tc h E a s t In d ies, 355 ; P ro sp ectin g in Q ueensland, 34 ; and S ilv er a s M oney M etal, T . A. R ickard on , 2 ; -S ilv er Ore M in ing in N ev a d a (Park)— D ig e s t, 190 ; S up plies, R e v ie w o f W orld, 318 ; V olum etric A ssa y o f, W . B . Pollard on , 195, 252 ; on the W est Coast o f A frica ... 67

G olden H o rseshoe (New) ... 328

G oldfields of D u tc h W e s t B o rn eo (M. W . v o n B ernew itz), 287 ; (E . J . V a ffen tin e), 86 ; (P . M. V an B o sse) ... 223

G ooday, W . E ., on th e T ech n icien in C om m erce... 133

G openg C o n solidated ... 136

G overnm ent G old M in in g A reas ... 253

G ranada ... 3 8 , 191, 295, 359 G ranby M ining, S m e ltin g , and Pow er C o ... 100

G ra v im etric S u rv ey s, T errain and T op o g ra p h ica l E ffec ts in (W . G. G. C ooper) ... 2 8 2 G reat B e a r L a k e.— M inerals (K idd)— D ig e s t, 188 ; M in es 2 52, 296 G reat B o u ld er P r o p r i e t a r y 227, 328, 353, 384 G rootvlei P ro p rietary ... 354

G ross and D ea n — E x p lo s iv e Crushing— D i g e s t ... 247

G roves, A . W ., o n G old in K en y a and U ganda ... 260

G rum m itt, W . C.— P ro sp ectin g for A lluvial D e p o s its ... 347

G utenberg— H andbuch der G eophysik— R ev iew 27, 351 H .E . P ro prietary, 64 ; (N ew ) ... 6

H addock— D eep Borehole S u rveys and Problem s— R e v ie w . . . 350

H a d field — F a ra d a y and H is M etallurgical Researches— R e v i e w ... 5

H a lk y n D is tr ic t M in es D ra in ag e C o 6 8 , 113 H a ll, A . L ., R e tir e s from G eo lo g ica l S u r v e y o f S o u th A f r i c a ... 161

H a m ilto n — N e w P r e c ip ita tio n and C yanide P rocess— D ig e s t . 118 H a n co ck , R. T .— T h e D istr ib u tio n o f E n erg y in Crushing, 3 37 ; T h e S cien tific F u n d am en tals o f G ravity Con­ c e n tr a tio n ... 30

H a u la ge a t N ora n d a (R o b in so n )— D ig e s t ... 59

H ecla M in ing C o 3 5 , 165 H ed ström , H .— E le c tr ica l P r o sp e c tin g fo r A u riferous Quartz V e in s and R eefs ... 201

H en d erso n , D e a th o f D . D ... 39

H en derson and S tea rt— M ine V e n tila tio n w ith P ropeller Fa n s— D ig e s t ... 49

H ercules M in ing, S m eltin g , and P ow er C o... 3 5 7 H ill, H . R .— E a s t G eduld M in e ... 73

H odb arrow H aem atite M in es, S a n d -F illin g a t, A . A. Jo n es o n , 130 and D i g e s t ... 177

H offm an n, H . and C.— Lehrbuch der Bergwerksm aschinen— R e v i e w ... 2S H o is t fo r L ak e Shore (Y oung)— D i g e s t ... 53

H o istin g , K o e p e ... 251

H o llin g er C on solidated ... 36, 101, 166, 231, 2 94, 3 5 8 H o llo w a y , H . L.— G old in Ecuador ... 2 1 9 H o n g k o n g T in ... 64

H ooper, E dward— A rbitration Procedure ... 348

H o o v er , H erbert, and th e N e w French P r e s id e n t ... 322

H o w e S o u n d C o ... 165

H o w e y G old M ine ... 3 8 , 167, 29^ 360 H u d so n B a y M in ing and S m e ltin g C o... ‘ o. , H y d ra u lic P ip e -L in e s (F. W . L e ig h to n ) ... H ydrogenation, S ta tu s of, etc... 253

Iberian T in D e p o s its ... 126

Id r is H y d ra u lic T i n ... 264

In d ia , N e w G eo lo g ica l Map o f ... 127

In d ia n C op per C orporation ... "1 In s titu te o f M etals.— 8 5 ; A n nu al M eetin g ... 2 , 1 9 c In stitu tio n .— A nnual M eetin g, 3 2 2 ; B en e v o le n t Fund, 66, 94, 160, 194, 223, 285, 347 ; and C o-operation w ith O ther B o d ie s, 323 ; G old M ed al... 2 5 8 ,3 2 3 In ter n a tio n a l M in ing C o r p o r a t io n ... 164

I n ter n a tio n a l N ic k e l C o... 3 7, 1 02, 1 67, 2 3 2 , 2 95, 318, 359 In ter n a tio n a l S m elter a t M ia m i ... 191

Iro n .— M anufacture o f Spo n g e— P a te n t, 191 ; M etallurgy— P a te n t, 63 ; M in es, L ake S u p erior, 252 ; M ines, N orw egian 252 I tib ir a Iro n Ore C o... 264, 3 2 8 J a m es.— Screen s, 42 ; T ab le S t o r y ... 6 6 Japan, M ineral R esources of ... 382

Jo h ann esbu rg C o n so lid a te d ... 6 , 198 J o n es, A . A ., o n S a n d -F illin g M ethod s a t H odb arrow , 130 and D i g e s t ... 177

Jo n es and Cissarz— G erm an-E nglish Geological Term inology— R e v i e w ... 350

J o n e s, G . C arleton— Sub N ig e l G old M i n e ... 137

J o s T in A r e a ... 128

J o y L oad er ... 298

K aduna P rospectors ... 383

K aduna S y n d i c a t e ... 384

K a fu e Copper D e v e lo p m e n t C o ... 135, 263 K agera (U ganda) T i n f i e l d s ... 71

K a la h a ri D e se r t D e v e l o p m e n t ... 196

K a lg o o rlie, T elluride M inerals a t (Stillw ell)— D ig e s t 249 K a m u n tin g T in ... 64

K a o lin , E u rop ean ... 191

K apaonik M i n e s ... 328

K a ta n ga T in P ro p erties (R . W . S c o t t ) ... 24

K a virondo, G eo lo g y o f So u th ern (W ayland )— D ig e s t ... 317

K a y Y ew (K in ta V alley) T in ... 8

K eg el— Lehrbuch der B ergw irtschaft— R e v ie w ... 224

K en t (F.M .S.) T in D red g in g ... 136

K en y a .— G eo lo g ica l S u rv ey, 2 58, 260 ; G eo lo g y o f S outhern K a v iro n d o (W a y la n d )— D ig e s t, 3 1 7 ; G old in , A. W . G roves o n ... 260

K e y s and E v e — M a gnetic S u rv ey s o v er D y k e s— D i g e s t . . . . 245

K id d — M inerals o f th e Canadian N o rth W est— D ig e s t ... 188

K illin g h a ll T in D red g e ... 126, 358 Kirkland L ake, 37, 102, 167, 295, 3 5 8 ; E le c tr ic P ow er a t (Tyrrell)— D ig e s t ... 379

K itso n , S ir A lbert, o n G old in W e st A f r ic a ... 67

K o ffy fo n tein M ines ... 326

K reuger and T o ll and B o lid en M i n e ... 72

K rupp R ak e C la s s if ie r ... 40

K w angsi P ro v in ce, M ineral R esources o f ... 318

T H E MINING MAGAZINE

L ak e, P . R ., o n S y s te m a tic S a m p lin g o f A llu v ia l D e p o s its

b y B an k a D rill, 258 and D i g e s t ... 305

L ak e S h ore, 36, 101, 166, 231 ; N e w H o is t fo r (Y o u n g )— D i g e s t ... 53

L ak e Sup erior Iron M in e s ... 252

L ak e V iew and Star ... 109, 353 L akeland M ines 37 25 4 226 61 M ining C orporation o f Canada ... 102, 295 M in in g L a w s o f the B r itis h E m p ir e a n d o f F oreign C ou ntries : N e w ... 03

M odderfon tein B G old M i n e s ... 134

P A G E M odd erfon tein D eep 2 5 4 L a k ev ie w M in ing C o... 356

L a n glaagte E s ta te ... Law n H ills ... L aw rence— G round B reaking a t D o m e M ines— D ig e s t . . . . L ea d .— B u llio n , S ilv e r A n a ly sis in , 1 2 6 ; M e t a l lu r g y - P a te n t, 2 52, 382 ; P o sitio n in 1931, 4 ; -Z inc D e p o s its in N ig eria (T attam )— D ig e s t, 5 5 ,1 2 6 ; -Z in c O res in D o lo m ite , 126 ; -Zinc Ores, S e lec tiv e F lo ta tio n o f, 62 ; -Z in c-Silver M ines o f P u lacayo ... 318

L e ig h to n , F . W .— H y draulic P ip e -L in e s ... 2 2 4 L oangw a C on cession s ... 327

L om ah (R hodesia) G old M in es ... * ... 256

L on don T in C o r p o r a t io n ... 2 6 4 L o n ely R e e f G old M ining C o ... 135, 326 L o m e G old M i n e s ... 35, 165, 230, 293 L ow er B isic h i (N igeria) T in ... 255

L u ip aard ’s V lei ... 227

L u iri G old A r e a s ... 71, 2 28, 263 L u y k en and B ierbrauer— D ie F lotation — R e v i e w ... 288

M cCreedy T in s (Sw aziland), L td ... 135

M cIn tyre P o r c u p in e ... 36, 101, 1 6 6 , 2 3 1 , 2 9 4 M cM ahon G old M in es ... 36

M acassa 167, 2 9 5 , 359 M agnesium M etallu rgy— P a te n t ... 126, 319 M agnetic.— F ield , In stru m en t for— P a te n t, 319 ; S urv ey in g , 252 ; S u rv ey s o v e r D y k e s (E v e an d K ey s)— D i g e s t 245 M agnetite, N o r w e g ia n ... 252

M alaya C o n so lid a ted T in D red g in g ... 98, 128 M alayan.— G ov ern m en t D e c e n tr a liza tio n of, 258, 2 9 2 ; M in ing R e g u l a t io n s ... 163

M alayan C ollieries, L td ... 355

M alayan T infields, L td ... 128, 328 M anganese C orp oration ... 98, 289 M an ito ba , Geology an d M in era l D e p o sits o f So u th -E a stern . . 383

M anitoba F lin F lo n ... 318

M apeke A sb e sto s M in es ... 7, 128 M arch M ine ... 231

M arievale N ig e l ... 135, 3 5 4 M arkham W in d in g E n g i n e ... 361

M arkscheidekunde (W ilski)— R ev iew ... 349

M ason and B a r r y ... 320

M ataham bre, M illing M ethod s a t ... 251

M avor and Coulson J o y L o a d er ... 2 9 8 M aw chi M i n e s ... 8

M ayer and Schranz— F lotation— R e v ie w ... 94

M azapil Copper C o ... 328

M echanical E q u ip m e n t in M ines (F. J. Garland) ... 344

M ercury R e c o v e r y ... 382

M essina Copper C on verter ... 191

M essina (Transvaal) D e v e lo p m e n t ... 63

M etalliferous M in in g In d u stry A d v iso r y C o m m ittee ... 194

M etallurgical R esearch ... 66

M etallurgy and E n g in eerin g, S ir H en ry F o w ler on ... 196

M etropolitan-V ickers.— P rogress in 1931, 105 ; W in d in g E n g in e s fo r N orth B roken H ill... 381

M exican C o r p o r a t io n ... 136

M exican S ilv er M in e s ... 126

M eyer and C h a r lt o n ... 198

M ichigan C opper D e p o sits ... 62

M id d elv lei B la ck R e e f G old S y n d i c a t e ... 31

M illing.— o f G old Ores (B aker)— D ig e st, 3 6 9 ; M ethods a t M attaham bre, 2 5 1 ; Underground, a t G ilm a n ... 3 1 8 M ine.— Cages, C ou pling o f, 251 ; Claim s A llo tte d b y S w eep sta k e, 322 ; S ta tis tic s ... 251

M inerals S e p a r a t io n ... 200

M ines, M odern M echanical E q u ip m e n t in (F. J . G arland). . 344

M ining.— A rc-W eldin g in , 3 6 2 ; M ethod a t Q uesta (Carm an)— D ig e st, 125 ; S q u a re -S e t ... 2 5 1 M offat-H all ... 37, 102, 167, 231 M olyb den ite D e p o s its o f La Corne ... 383

M o ly b d e n u m .— C a r b o n y l M a n u f a c t u r e — P a t e n t , 3 1 9 ; M in ing a t Q uesta (Carman)— D ig e s t ... 125

M oodies G old M in ing and E x p lo r a tio n C o... 134

D ig e s t ... 58

... 39

M orkwa, L td ... M orley— N e w G uinea G old Mine M orse F le x ib le C o u p lin g ... M orton W o o lse y C o n solid ated M ines ... 229

M ount E llio tt ... 33, 128, 291, 352 M ount I s a ... 32, 95, 162, 2 26, 2 90, 3 18, 352 M ount L y ell, Coarse C rushing a t— D ig e s t ... 123

M ount Morgan 9 6 , 162 M ount O xide ... 33, 2 9 1 , 352 M ount W a n d o o ... M ufulira C opper M in es . . Murdoch C opper P rocess M urex ... M ysore G old ... 352 7 227 200 255 320 264 382 95 6 200 72 58 163 353 198 253 263 319 1 26 161 318 381 99 2 5 5 383 N a ragu ta K aram a A reas ... N a tio n a l M in ing C o r p o r a t io n ... N ’Changa Ore D e p o s i t s ... ... N e v in — P rin c ip le s o f Stru ctu ra l Geology— R e v ie w ... N e w A lb io n T ran svaal G old M in es... N ew C o n solid ated G old F ie ld s ... 199,

N e w G oldfields of V en ezu ela ... N e w G uinea G old M ine (M orley)— D ig e st ... N e w G u inea G old, N .L ... N e w G uinea G oldfields ... 71,

N e w K le in f o n t e in ... N e w S ta te A reas ... 251,

N e w V aal R iv e r D ia m o n d and E x p lo r a tio n C o... N ick el S teel P ro d uction fro m S u d b u ry Ore ... N ig e r ia L ead-Z inc D e p o sits (T a tta m )— D i g e s t ... 55,

N ’K ana M ine ... N orand a, 3 8 , 1 03, 1 67, 2 3 2 , 2 95, 3 5 9 ; H a u la g e a t (R obinson ) — D ig e st, 59 ; S m e lte r ... N o r th B roken H ill C o., 327 ; N e w P la n t a t— D i g e s t --- N orth ern T ra nsvaal (M essina) C opper E x p lo r a tio n C o... N u n d y d ro o g M in es... 138, 200, N y a sa la n d P ro tecto ra te: W a ter S u p p ly I n v e stig a tio n ... O ceana D e v e lo p m e n t ... 6 , 161 Offin R iv e r G old ... 123

O il.— from Coal, 130 ; P ro d u ctio n M ethod s, A. B e e b y T h o m p son on, 3 2 4 ; in Q ueen sland, 291 ; -Shale in N e w S o u th W ales, 162 ; -Shale in T a sm ania ... 227

O il, L ubricating, T e s ts ... 192

Oil-Sh ale D evelopm ent, A W o rld S u rvey o f R e c e n t... 253

O il-W e ll Com pletion a n d O peration ... 127

O oregum G old ... 2 5 5 O re. D e p o sit, T em p era tu re o f an E p i-T h erm al, H . C. B o y d ell on, 261 and D ig e s t, 315 ; -M icro scop y , 1 2 6 ; R e serv es, M alayan ... 291

Ores, R efractoriness o f R a n d B a n k e t (W hite)— D ig e s t . . . . 182

O roville D red g in g ... 136, 320 Panam a C o r p o r a tio n ... S, 7 2 , 3 2 8 Park— G o ld -S ilv er Ore M in ing in N e v a d a — D i g e s t ... 190

P a tin o M n es ... 3, 320 P a tta n i T i n ... 64

P en a w a t (Malaya) T in D r e d g i n g ... 9 8 , 128 P engk alen ... 384

P e ta lin g T in ... 136

P etroleum , Geology o f (E m m o n s)— R e v i e w ... 95

P etters H ig h -S p eed D ie s e l ... 106

P h o sp h a te in N o r th A fr ic a ... 382

P ie t R elief, Geology o f C o u n try S o u th o f ... 253

P io n eer M ine ... 3 5 , 164, 2 9 3 (2), 356 P ip e-L in e Corrosion L o c a tio n b y E lectrical M easurem ents . . . 191

P |P e -L in e s , ^ PAGE

P la c er — D epo'. Welded (F . W . L eig h to n ) ... 224

■n French ¿ G eo lo g y (C o c k h e ld )- D ig e s t, 313 ;’ Gold M in in g H i s t o T al A frica . 191 ; M ining in B C 2 ‘>9 ■ P la c er D e v e l o p ^ ' ...! PA G E 127 P la tin u m M etals 126 P o U a r d ^ B o ^ - ™ - ^ e n t ; ; ; ; ; ; ; ; J f 9 P o rter Id a h o M ines ... 1 95, 252 P o ta sh fro m L e u c ite — P a te n t 293 P o tg ie te rsr u st P la tin u m s ... 319

P rem ier D ia m o n d M in e ... ... 6, 70 P rem ier G old M in es ... ... o ' P rem ier (Transvaal) D ia m o n d M in ing C o... ^ Probenahm e von E rzen — R e v ie w ... <(t • o n P ro sp ectin g .— fo r A llu v ia l D e p o s its (W . C. Grumm itt) 347 and (A. F . Sk erl), 2 1 3 ; P le a fo r A erial and G eo ­ p h y s ic a l... 322

P r o sp e r ity M ine ... 293

P u lp S a m p lin g ... 62

P u m p , G rit ... 163

P y r ite s B u rn in g — P a te n t ... 63

177 29 241 94 R a d iu m .— in C anada, 2 5 2 : L e g isla tio n in B .C ... 357

R a m b u t a n ... 128

R a m sa y — C yan id e E q u a tio n s— D i g e s t ... 377

R a n ta u T in D r e d g in g ... 128

R an d.— B a n k e t O res, R e fr a c to r in e ss o f (W h ite )— D ig e s t, 182 ; O u tp u t R ec o r d , 6 ; W a ter P ro b lem s o n th e ... 382

R an d M i n e s ... 198

R an d S e le c tio n C orp oration ... 70

R a n d fo n tein E s t a t e s ... 198, 2 2 7 , 2 5 4 R an so m es an d R a p ie r E x c a v a to r ... 297

R aub A u stralia n G old M in es ... 355

R ed in g to n — G old M illin g a t C on iau rum — D i g e s t ... 125

R ees and W h itta k e r — V e n tila tio n a t R o b in so n D e e p — D ig e s t 180 R efractoriness, M ea su rem en t o f (W h ite )— D i g e s t ... 182

R en o G old M in e s ... 3 5 , 2 3 0 , 293, 3 5 6 R escue A p p ara tu s fo r M in es ... 126

R esearch, D e p a r tm e n t o f S c ie n tific a n d I n d u str ia l ... 66

R ezende M in es ... 2 5 5 , 326 R h odesia.— C opper M in in g in , 63 ; G e o lo g y o f N o rth ern , 130, 194 an d D ig e s t, 241 ; M ineral R e so u r c e s o f, 2 2 8 ; M ineral R ig h ts in , 3 5 4 ; N e w M in in g L a w fo r S o u th ern 99 ; R a ilw a y D e v e lo p m e n ts A f f e c t in g ... 196

R h o d e sia -K a ta n g a C o ... 199, 327 R h o d esia M inerals C on cessio n , L t d ... 7

R h odesian A n g lo A m e r ic a n ... 327

R h odesian C o rp oration ... 7 , 135, 199 R ickard, T . A .— o n B im eta llism , 2 ; R e c e iv e s I n s titu tio n G old M edal ... 2 5 8 ,3 2 3 R ie s and W a tso n — E n g in eerin g Geology— R e v ie w ... 160

R io T in to ... 200

R isin g, C osts o f St. J o h n D ’e l R e y M in in g C o ... Sabie (Transvaal) G o ld M in in g C o ... Sales Engineer, T h e ... Salisbury G old B e lt (T y n d a le-B isco e) D i g e s t ... Sam pling w ith H a m m e r D r i l l s ... San A n to n io , 2 9 6 ; M ill— D ig e s t ... 251 252 San F ra n cisco M ines of M exico " T V ” V « « i i n and S a n d -F illin g M ethods a t H odbarrow , A . A . J o n e s o , 1 S M r ts a n a ly s e n , A u sg e w M te M e t h o d e ' ja ' ^ 4 S chneiderhohn, H ., o u G eo lo g y o f N orth ern R h o d esia , 1 a n d D i g e s t ...; ... n Schranz an d M ayer— F lotation— R e v ie w ... g4 S c o tt, R W — K atanga T in P ro p erties ... ^ Selukw e G old M in ing and F in a n ce Co. . . . ... • • • ■■■' Shab ani A sb e sto s M in es, J a c k S p a lding o n , 13U ^

Dis«st ... •;•••...'25,62

Sinai M ining Co... 328

Sinclair, W . E .— A lluvial M ining w ith M echanical E x c a v a to r s 15 Sin terin g Ores ( 2 ) ... 191

S isco e G old Mine ... 295, 3 5 9 Skerl, A. F .— Prospecting for A lluvial D e p o s i t s ... 213

S kip s.— D u ralum in— D ig est, 378 ; M ining ... 382

S m eltin g , R everberatory at M iam i... 191

S m ith , S. W ., E le c te d P resident of th e I n s titu tio n 2, 322 S o n s o f G w alia ... 327

S o u th K algurli ... 264

S o u th -W est Africa, H y d rology o f ... 318

S pa ld in g , J a ck , o n Shabani A sb estos M in es, 130 an d D ig e s t 184 S prin gs M in es... S tea rt and H enderson— M ine V en tila tio n w ith Propeller Fa n s— D ig e s t ... S te e l In d u str y C o - o p e r a t io n ... Step h en son , D e a th o f G eorge ... S te w a r ts and L loyds ... S tillw ell— T ellu rid e M inerals a t K algoorlie— D ig e s t ... S to p in g , T o p -S lice ... ; ... S tru c tu ra l Geology, P rin c ip le s o f (N ev in )— R e v i e w ... Sub N ig e l, 2 6 2 , 3 5 4 ; G old M ine (G. C arleton Jones) • • • • ; • • Sulp h id e.— B la st R o a stin g of— P a te n t, 382 ; C hlorination o f— P a te n ts (2), 1 2 6 ; O res, T rea tm en t of— P a te n t, 6 3 ; 191 • T r e a tm e n t o f— P a te n ts (2) ... 64, 19i 262 49 322 103 322 2 49 382 137 382 352 63 384 R oan A n t e l o p e ... 7 1 , 135, 161 R o b inson— H a u la g e a t N o ra n d a — D ig e s t ... 59

R obinson D e e p , 2 5 3 ,3 2 6 ; V e n tila tio n a t (R e e s and W h itta k e r ) — D ig e s t ... Rocks, T he S tu d y o f (Shand)— R s v ie w ... 160

Rdnnskar C opper W orks ... 382

R ooiberg M in erals D e v e lo p m e n t C o ... 263, o_6 R ose D e e p ... R oum ania, G old M in in g i n ... ^ R ow e— A lderm ac M ill—D ig e s t ... 369

R oyal S ch o o l o f M in es A n nual D in n e r ... 343

Ruhuhu Coalfields, R epo rt on Geology ... 319

R u sso -A sia tic C o n so lid a te d ... R ustenberg P la tin u m M in es ... * R u sto n -B u cy ru s D r a g l i n e ... R o a stin g of— P a ten t, Sulphide C orporation . . S ulphur in P e t r o l ... 1 9 1 S un gei K in ta ... ^ S u n g e iW a y ... ^ S w azilan d M ineral A rea ... S w eep sta k e for M ine Claim s ^ 1 8 0 S y lv a n ite 251 133 264 22 8 133 375 251 T aq uah & A b o s s o ... * 383

T a tta m — L ead-Z inc D e p o s its in N igeria— D ig e s t ... oo, jlzo T ea le— S h in y a n g a D ia m o n d F ield s— D ig e s t ... T ech n icia n in C om m erce, W . E . G o o d a y o n t h e ... T eck -H u g h es, 37, 102, 167, 231, 2 94, 3 5 8 ; M ill... W T eja M alaya T in D r e d g i n g ... ’ gg4 T ekka-T aiping ... 2g5 T ellu rid e G old M ines ... - • ;• • • ■ • " ; ... . T ellu rid e M inerals a t K a lg o o r lie (Stillw ell)— D i g e s t . . ...

T e tiu h e R ev erts to U .S .S .R . G o v ernm ent ... g , g T h arsis Sulphur an d C o p p e r ...

T h ic k e n in g S lim es, Im p ro vem en ts for— P a te n t ... ^ Thomas, W illia m , M e m o r ia l ...

T h o m p so n , A . B e e b y , on O il P roduction M e t h o d s ... 3 . 4

T h racia n G alena P ro d u cts ... 2 56

T h racian U n io n T r u s t ... g T ig o n M in ing and F in a n c e ...

TH E MINING MAGAZINE

T in.— A n cie n t W o rkin gs in S ou th ern R h o d esia , 31 ; Control, 72, 97, 164, 2 64, 328, 354 ; D e p o sits, Iberian, 126 ; M ining in Cornw all, 191 ; P o sitio n in 1931, 4 ; P ro p erties,

K atanga (R. W . S c o tt), 2 4 ; Z in c R e co v ery — P a t e n t 319 T in H o ld in g s, L td ... 136, 2 56, 3 2 8

T o y o T i n ... 256

T ransvaal E x p lo r in g L and and M inerals C o... 134

'Treadwell Y u k o n ... 1 0 2 , 232 Trepca M ines ... 72, 2 6 4 T r e v ith ic k M em orial ... 2 5 8 T ri-S ta te O re-D eposits ... 126

T r o p ica l H yg ien e B .R .C .S . M a n u a l ... 252

T u n g ste n .— C arbonyl M anufacture— P a te n t, 3 1 9 ; Ores, C o n ce n tr a tin g (Vanderburg)—D ig e s t ... 318

T u n n e l, M in es D ra in a g e, in N o rth W ales, J. L. F ra n cis and J . C. A llan on, 68 and D ig e s t ... 113

T u n n ellin g R e c o r d ... 322

Turner, G. W . E a to n — A sh a n ti G oldfields C o r p o r a tio n ... Turner, S c o tt, B e c o m es P resid en t o f A m erican I n s t i t u t e .. . . T w e efo n te in C olliery ... 255

T yn d a le-B isco e— Salisbu ry G old B e lt— D ig e s t ... 375

Tyrrell— E lectric Pow er a t K irkland Lake— D i g e s t - 3 29 194 379 U gan da (E. J . W a y la n d ), 9, 90, 151 ; G old in , A . W . G roves on ... 2 6 0 U n ger, F . A .— H isto ry , D e v e lo p m e n t, e tc ., o f D a g g a fo n te in M ines ... 265

U n io n C o r p o r a tio n ... 135, 200, 354 U n io n M inière, 2 2 8 ; L ea ch in g O perations ... 191

U n ite d S ta te s S m e ltin g and R efin ing Co... 230

U n ite d S te e l C om panies ... 322

V a llen tin e , E . J .— G oldfields o f D u tc h W e st B o r n e o ... 86

V an B o sse , P . M.— G oldfields o f D u tc h W e st B o r n e o ... 223

Van R y n D e e p ... 254

V an adiu m in S te el, A n a ly sis o f ... 318

V anderburg— C o n cen tra tin g T u n g sten O res— D i g e s t ... 318

V en tila tio n .— D u st in M ine A ir, 62 ; a t F ro o d M ine, 318 ; In ter m itte n t, o f M ines, 382 ; w ith Propellor Fans (Steart and H enderson)— D ig e st, 49 ; a t R o b in so n D e e p (R ees and W hittaker)— D ig e s t ... 180

V enture T r u s t ... 200

V ereeniging E s ta te s , N e w S h a ft ... 191

V ib o rita G old M in es ... 264

V ickers P ro jection M ic r o s c o p e ... 234

V icto ria P ro sp ectin g Co... 262

V illage D e e p ... 134

V ipond ... 36, 166, 231, 2 9 4 , 358 V l a k f o n t e i n ... 354

W a ih i G old ... 320

W a ite -M o n tg o m e r y ... 3 8 , 295 W a lv is B a y R a ilw a y P ro ject ... 196

W a te r D iv in e r s a n d th eir M ethods ... 63

W a ter Problem s o n th e R an d ... 3 8 2 W a ter S u p p ly , A P ra ctica l H andbook on (D ix ey )— R e v ie w . . . 30

W a tso n and R ies— E n gineering Geology— R ev iew ... ' . . . 160

W ayland, E . J .— G eo lo g y o f S o u th ern K avirondo— D ig e st, 3 1 7 ; U g a n d a ... 9 , 90, 151 W eld ing.— S e ts fo r U se U n dergroun d, 362 ; S tru ctu ra l. . . . 3 8 2 W ellin g to n B ea v erd ell S y n d ica te ... 3 5 7 W e st A frican G o l d ... 67

W e st A frican M in es and E s t a t e s ... 384

W est R an d C o n solidated 161, 198 W e st Springs ... 2 6 2 W estern A reas ... 31

W estern A ustralian G old ... 97

W estern G o ld S y n d i c a t e ... 2 5 6 W h ite — M easu rem ent o f R efractorin ess— D ig e s t ... 182

W h itta k e r and R ees— V e n tila tio n a t R o b in so n D e e p — D ig e s t 180 W ilfley -W illia m s Screen ... 40

W illan , T . L.— B u ck et D redge L o sse s ... 149

W illb o u m , E . S .— B ea trice M ine, S e l ib i n ... 20

W ille y , J . L.— D a g g a fo n te in M in es, Surface E q u ip m e n t, e tc . 2 6 5 W ilsk i— M arkscheidekunde— R ev iew ... 349

W i l u n a ... 7, 71, 97, 199, 263, 353 W in d in g , S k ip ... 126

W ire R o p es, L u b rica tin g ... 62

W itp o o r t G old A reas ... 6 , 70, 1 34, 198 W itw atersran d D e e p ... 2 5 5 , 3 5 4 W itw atersrand G old ... 2 5 4 W itw atersran d U n iv e r sity Library ... 325

W o o d w o rth — G old M illing a t A rgonau t— D ig e s t ... 62

W rig h t-H a rg rea v es ... 37, 102, 166, 2 31, 294, 3 5 8 P A G E Y ou ng— N e w H o is t fo r L ak e Sh o re— D ig e s t Y u k o n C o n solidated ... 53 200 Z inc.— E le c tr o ly tic , 2 5 2 ; -L ead D e p o sits in N ig eria (T a tta m )— D ig e st, 55, 1 2 6 ; -L ead O res in D o lo m ite , 126 ; -Lead O res, S e le c tiv e F lo ta tio n o f, 62 ; -L ea d -S ilv er M in es o f P u la ca y o , 31 8 ; M etallurgy— P a te n t, 63 ; Ore S in ter in g , 1 9 1 ; O xid e M anufacture— P a te n t, 63 ; P o s itio n in 1931, 4 ; and T in R e c o v e r y — P a te n t ... 319

Z leto vo M i n e s ... 8

Zululand G o l d ... 354