The Journal of Industrial and Engineering Chemistry, Vol. 1, Contents

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CONTtNTS

JOURNAL OF INDUSTRIAL AND LNGINLLRING CHLMI VOL. I, 1909

JANUARY.

5

Ed i t o r i a l s:

The Industrial Chemist and His Journal. B y T. J. Parker 1

The Ethics o f Engineering Supplies. B y William H. W alker... . 2

The Sugar Industry in Its Relations to the United States. By W . D. Iiorn e... 4

The Fixation o f Nitrogen. B y F. B. Carpenter... 4

Standard Methods o f Analysis. B y W . D. Richardson... 5

Or i g i n a l Ar t i c l e s: Free Lime in Portland Cement. B y Alfred H. W hite... Notes on Anthracite Producer Practice. By George C. Stone... 1 1 A Comparison o f the Calculated and Determined Viscosity Numbers (Engler) and Flashing and Burning Points in Oil Mixtures. B y H. C. Sherman, T. T . Gray, and H. 'A. .r>: Hammersclilag... 13

A New Bom b Calorimeter. B y Chas. J. Emerson... 17

The Manufacture o f Oil o f Lemon and Citrate o f Lime in Sicily. B y E. M. Chace... 18

Turpentine and Its Adulterants. B y Arthur E. Paul... 27

The Determination o f Total, Fixed and Volatile Acids in Wines. B y Julius H ortvct... 31

A Comparison o f Methods for the Preparation o f Milk Scrum. B y Hermann C. Lytligoe and Lewis I . Nurenberg... 38

No t e s: On the Use o f Incandescent Lamps with Volatile Solven ts.. . . 40

The Bureau o f Standards’ Analyzed Samples... 41

Report o f the Committee on the Analysis o f Phosphate R ock 41 A Test for Skin Pulp in Tomato Catsup... . T ^ttT'TT 44 The Committee on Analysis of Fats, Soaps, and Glycerine . . . . 44

Qu o t a t i o n s: Chilean Nitrate Fields... 45

Catalytic Reduction of Fats and Oils... 47

Indian Indigenous D yes... 47

Concrete Railway T ies... 48

Bo o k Re v i e w s: Metallurgy; Electro-Metallurgy; Der Bctricbs-Chemiker; The Chemical Analysis o f Iron; Laboratory Guide o f Industrial Chemistry; Soils and Fertilizers; The Manufacture of Lubricants, Shoe-Polishes, and Leather Dressings; Liquid and Gaseous Fuels and the Part They Play in Modern Power .Production; The Power Handbooks; Methods and Devices for Bacterial Treatment o f Sewage... 49

N e w B o o k s ... 52

Sc i e n t i f i c So c i e t i e s: American Chemical Society; American Electrochemical Society; Western Association o f Technical Chemists and Metallurgists; Association o f Official Agricultural Chemists; American Association for the Advancement o f Science; American Institute o f Mining Engineers; American Leather Chemists'Association... 53

T r a d e a n d I n d u s t r i a l N o t e s... 57

O f f i c i a l R e g u l a t i o n s a n d R u l i n g s... 59

FEBRUARY. Ed i t o r i a l s: Natural Resources and Manufacture. B y Arthur D. Little 61 Standardized Samples. B y W . C. E baugh... 62

The Road Problem and the Chemical Engineer. B y Clif ford Richardson... 63

The Electric Steel Furnace. B y W . R . W hitney... 64

An American Institute o f Chemistry. B y George A u ch y 64 Or i g i n a l Ar t i c l e s: The Amount o f Inert Volatile Matter in the Mineral Con stituents o f Coal. B y W . Brinsmaid... 65

68 • The Stability o f Rosin at Slightly Elevated Temperatures. B y Chas. H erty and W . S. D ickson... Soil Acidity in Its Relation to Lack of Available Phosphates. By. C. W . Stoddart... 69

A Remarkable Accumulation o f Nitrogen, Carbon and H u mus in a Prairie Soil. B y F. J. A lway and C. E . V ail 74 Rapid Determination o f Oil in Cottonseed Products. B y Chas. H. Herty, F. B. Stem and M. O rr... 76

Determination o f Sulphurous Acid or Sulphites or Sulphur Dioxide in Food Products. B y Edward Gudeman... 81

The Determination o f Essential Oil and Alcohol in Flavor ing Extracts. B y Julius H ortvet and R odney Mott W est... 84

The Deterioration and Commercial Preservation o f Flesh Foods. Second Paper— The Storage o f Beef at Tem peratures above the Freezing Point. B y W . D. R ich ardson and E. F. Scherubel. ... 95

Ad d r e s s e s: The Efficiency and Deficiencies o f the College-trained Chemist, when Tested in the Technical Field. B y William H. Nichols... 102

The Unfilled Field o f Chemistry. B y Arthur D. Little... 105

No t e s: The Methods o f the United States Steel Corporation for the Commercial Sampling and Analysis o f Iron Ores 107 Report of the Committee of the American Chemical Society Appointed to Co-operate with the National Conserva tion Commission... 115

Light Naphtha as a Turpentine Adulterant... 117

A Peculiar Chlorate Explosion... 118

A New Combustion Pipette... 118

Determination o f Insoluble Phosphoric A cid ... 119

Council on Pharmacy and Chemistry, Regulations Relative to New and Non-Official Remedies... 119

Qu o t a t i o n s: The Oxidation o f Atmospheric Nitrogen... 120

The Products of the Badische Anilin- and Soda-Fabrik... 121

Bo o k Re v i e w s a n d No t i c e s: Principles and Practice of Agricultural Analysis: The Mechani cal Appliances o f the Chemical and Metallurgical Indus tries; Chemical Reagents: Their Purity and Tests; Modern Power Gas Producer; Chemiker-Kalcnder, 1909; Labora tory Experiments in Metallurgy; Laboratory Notes on In dustrial W ater Analysis; Die Fabrikation von Leim und Gelatine; Les densities des solutions sucrdcs h Difftfrentes temperatures; "E ffects o f Formaldehyde upon Digestion and H e a lth "... 123

N e w B o o k s... 126

Sc i e n t i f i c So c i e t i e s: American Chemical Society; Industrial Chemists and Chemical Engineers; Fertilizer Chemists; American Association for the Advancement o f Science; American Institute of Chemical Engineers; Utah Society o f Engineers; Seventh International Congress o f Applied Chemistry; Committee 24, International Association for Testing Materials; Com mittee on the Analysis of Fats, Soaps and Glycerine... 127

P e r s o n a l N o t e s... 135

I n d u s t r i a l a n d T r a d e N o t e s... 135

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iv

MARCH.

Ed i t o r i a l s:

Education. By W . R. W hitney... 147

The Next Step in Publication for the American Chemical Society. By W . A. N o y e s... 148

• Sampling. By W . D. Richardson... 149

Or i g i n a l Pa p e r s: The Synthesis, Constitution, and Uses of Bakelitc. By L. H. Baekeland... 149

Accuracy in Sampling Coal. By E. G. B ailey... 161

The Commercial Manufacture of Amorphous Calcium Phos phide. B y Charles E. Munroe... 178

The Temperature of the Lead Button in Cupellation. By Robert H. Bradford... 181

A Nickel Crucible for the Determinations o f Carbon in Steel. B y Henry E. K. Ruppel... 184

The Colorimetric Determination o f Nitrates in Soil Solutions Containing Organic Matter. By W . A. Sym c... 188

The Determination o f Benzoic Acid in Tomato Catsup and Other F ood Products. By Rodney M ott W est... 190

Ad d r e s s e s: T o W hat Extent Should College Training Confer Practical Efficiency along Technical Lines? B y Louis M. Dennis.. . . 194

The Attitude of Technical Institutions to Post-Graduate Study. By William McMurtric... . . ... 196

The U. S. Patent System: Its Use and Abuse. B y Edward B. Moore... 198

“ Patents, Trade Secrets and Trade Names as Factors in Industrial Development— Their Relative Functions.” By W . Hastings Swcnarton... 199

Some Defects in the Practice of Our Patent System and Suggested Remedies. B y Louis C. Racgener... 201

The United States Patent System, Its Use and Abuse. By B .C . Hesse... 203

The United States Patent System, Its Use and Abuse. B y Dr. L. II. Baekeland... 204

No t e s: Phosphorus for the H cm pcl P ipette... 205

Mitchell-Walker Moisture T est...205

A Convenient Funnel for Introducing Dry Reagents of Powders into Bottles and Flasks without Loss o f Substance... 206

Tillandsia Usneoides... 206

Simple Specific Gravity Apparatus for Portland Cement 207 An Unusual Incrustation on Generator Coils... 208

T o Determine Fat in Sweetened Condensed Milk... 208

A Quick Method for the Determination of Arsenious Oxide in Paris Green and Other Insecticides... 208

Ne w Pl a n t s: The Indiana Steel Company's Plant at Gary, I n d ... 209

The Fink Smelter... 217

Qu o t a t i o n s: Peppermint Oil, American... 219

Bo o k Re v i e w s a n d No t i c e s: A Short Pharmaceutic Chemistry, Inorganic and Organic; Chapters on Papermaking; The Methods o f Textile Chemist* y ; Tonindustrie-Kalender, 1909; American Handy-Book of the Brewing, Malting, and Auxiliary Trades; Hand-book for Cement W orks Chemists; Factory Glazes for Ceramic Engineer... 220

N e w B o o k s... 222

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: American Institute o f Chemical Engineers...223

APRIL. Ed i t o r i a l s: Readjustment. B y W . R. W hitney... 233

Chemical Societies in America. By W . D. Richardson 233 Or i g i n a l Pa p e r s: The Rare Earths— Their Production and Application. By II. S. Miner and M. C. W hitaker... 235

Guayulc Rubber. I. B y Theodore W hittclsey... 245

Guayulc Rubber. II. Distribution o f Rubber in Different Parts of the Shrub. B y Theodore W hittclsey... 247

The Estimation o f Iron Oxide and Alumina in Phosphate Rocks. By Thos. S. Gladding. A .M ... 249

The Analysis of Commercial Acetate o f Lime: B y Thomas S. Gladding, A .M ... 250

The Rapid Determination o f Moisture in Commercial Products o f a Viscous or Semi-solid Consistency. B y Arthur Lowenstein... 252

A New Method for the Calculation of the Proteins in Milk. By Geo. A. Olson... 253

The Determination o f Bcnzaldchydc in Almond Flavoring Extract. B y W . Denis and P. B. Dunbar... 256

Re v i e w: Pharmaceutical Chemistry during 1908... 257

No t e s: A W ood Preservative... 260

The Bureau o f Standards Analyzed Samples... 260

A Simple Rapid Process Vinegar Generator for Laboratory Use... 260

Note-on Turpentine... 261

Determination o f Acetanilid in Hydrogen Peroxide Solu tions... 262

Note on Mr. Bailey’s Paper on Accuracy in Sampling C oa l... . 262

Discussion on “ Accuracy o f Sampling Coal.” By E. G. Bailey.. 263

International Congress o f Applied Chemistry... 267

Committee on Analysis o f Fats, Soaps and Glycerine... 268

Sodium for Drying Transformer Oils... 269

Standardized Samples... 269

Illinois Fuel Conference... 269

Bo o k Re v i e w s a n d No t i c e s: W ood Products, Distillates and Extracts; Rapid Methods for the Chemical Analysis o f Special Steels, Steel-making Alloys, and Graphite; A Short Handbook o f Oil Analysis; Heat Energy and Fuels; The Semiannual Scientific and Industrial Bulletin o f Roure-Bertrand F ils... 271

N e w B o o k s... 272

MAY. Ed i t o r i a l s: Fireproof Materials. Or i g i n a l Pa p e r s: B y Ernest B. McCready... 285

The Manufacture o f Carbon Electrodes. By G. A. Roush . . . . 286

The Detection o f Pin Holes in Tin Plate. B y William H. W alker... 295

The Consumption o f Nitrate of Soda in the United States. By Charles E. Munroe... 297

Change in the Composition o f Unground Cereals during Stor age. B y Sherman Leavitt and J. A. LeClerc... 299

A Rapid Method for the Determination o f Total Potassium in Soils. B y O. M. S h e d d... 302

Loss o f Potash in Commercial Fertilizers. B y F. B. Porter and E . G. K enny... 304

Ad d r e s s e s: Coal Analysis. B y N. W . L ord ... 307

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Re v i e w:

Pharmaceutical Chemistry during 1908... 310

No t e s a n d Co r r e s p o n d e n c e: The New Brady Gas Filter... 312

Volumetric Determination o f Copper in Sugar Analysis...313

Mercury Seals in Fat Extraction Apparatus, and a New Form o f Flask... 314

Variation of Moisture Content in Butter as Shown b y Different Methods o f Sampling... 315

Extractives from Guayule (Partlicnium Argentatum) ... 315

Mr. Bailey’s Paper on Accuracy in Sampling Coal... 316

A New Viscosim ctcr... 317

Bo o k Re v i e w s a n d No t i c e s: Post's Chemisch-Technische Analyse; Handbuch der analyt ischen Untersuchungen; The Chemistry o f Essential Oils and Artificial Perfumes... 318

N e w B o o k s... 318

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: American Chemical Society; International Congress o f Applied Chemistry; American Society for Testing Materials... 319

I n d u s t r i a l a n d T r a d e N o t e s...320

JUNE. Ed i t o r i a l s: The Development o f Intensely W orking Apparatus in Chcmi- cal Engineering... 327

Calorimeter Standardization... 328

Or i g i n a l Pa p e r s: Experiments on the Putrescibility Test for Sewage and Se- Sewage Effluents. B y D. D. Jackson and W . A. Horton.. 328

Contribution on the Chemistry and Physics o f Jelly-Making. B y N. E. Goldthwaite... .*... 333

A Study o f the Fatty Acids of Fish Oils. B y L. M. Tolman. . 340

The Relation between the Temperature o f Kerosene and the Explosion Pressure o f the Supernatant Mixture of Air and Vapor. B y W . P. Bradley and C. F. H ale... 345

Analyses and Friction Tests o f Lubricating Greases. B y Horace W . G illctt...351

Commercial Pyridine and Its Value as a Solvent. B y Ken neth G. MacKensie... 360

Purity o f Commercial Liquefied Ammonia Gas and Apparati for Testing It. B y Dr. F. W . Frerichs...362

No t e s a n d Co r r e s p o n d e n c e: Recent Legislation Relative to Explosives in the Mail and Transportation... 369

Method o f Analysis for Massecuitcs and Molasses... 370

The Valuation o f Insoluble Phosphoric Acid in Commercial Fertilizers... 371

A System o f Records for the Scientific W ork o f a Manu facturing Pharmaceutical Establishment...372

The Effect o f the Proposed Tariff Bill on American Chemi cals... 374

Econom y in the Use o f Oxygen for Combustion Carbons 375 A Simple Cover for Analytical W eights... 377

The “ Size-Weiglit” Percentage... 377

Definition o f “ Gasoline” ... 377

Controlling the Consistency o f Bituminous Binders... 378

Bo o k Re v i e w s a n d No t i c e s: Handbook ten Dienste van de Suikerriet-Cultur cn de Riet- suiker-Fabricage o f Java; Die Raffination des Zuckers; Sugar, A Handbook for Planters and Refiners; Labora tory Manual o f Dyeing and Textile Chemistry; Die Theorie der Farbe Vorgänge; Bedeutung der Kolloide für die Technik; Post’s Chemisch-technische .Analyse; Sprcchsaal Kalender for the Ceramic, Glass and Allied Industries; The Testing and the Properties of Sand Lime Bricks; Bulletin No. 9, Illinois State Geological Survey, “ Paving Brick and Paving Brick Clays o f Illi nois;” The Spanish Translation of the Pharmacopoeia of the United States of America; The Portland Cement Indus try from a Financial Standpoint... 380

N e w B o o k s... 384

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: American Electrochemical Society; American Society for Testing Materials; Sub-Committees of General Com mittees on Standard Specifications for Coals, American Society for Testing Materials; Seventh International Congress o f Applied Chemistry; Utah Society o f En- gincers; Utah Academy o f Science... 384

R e c e n t P a t e n t s... 388

Or i g i n a l Pa p e r s: Experiments on the Utilization o f Nitrogen^in Fertilizer Materials. B y Edward B. Voorhecs and Jacob G. Lip- m an... 397

Potash Tests in Mixed Fertilizers. B y J. E. Breckenridge.. . . 409

Chemistry o f Flesh— A Preliminary Study o f the Effect of Cold Storage upon Beef and Poultry. B y A. D. Em mett and II. S. Grindley... 413

Composition o f Scuppernong, Concord and Catawba Grape Juices, with Some Notes on the Determination of Total Acid. B y H. C. G ore... 436

American Molasses Feeds; Their Manufacture and Composi tion. B y J. E- Halligan... 441

A Rapid Method of Hydrolyzing Starch. B y Geo. A. O lson .. . . 445

The Preparation o f Soil Samples for Chemical Analysis. B y G. M. MacNider...447

The Changes in Crude Petroleum Effected b y Diffusion through Clay. B y David T. D ay and J. Elliott Gilpin... 449

Further Remarks on Vanadium and Its Estimation. By George A u ch y... 455

The Formation o f W hite Scale on Steel and the Surface De carbonization o f Pipe-Annealed Steel. B y Charles Morris Johnson... 459

Barium and Sulphur in Fluorspar. By^Henry G. Martin 462 JULY. Ad d r e s s e s: Some Interesting Points in the Manufacture o f C. P. Chemi- cals. B y J. T. Baker...464

The Utilization o f Atmospheric Nitrogen, Particularly for the Manufacture o f Air-Saltpetrc. B y Hofrat Prof. Dr. A. Bernthsen...466

No t e s a n d Co r r e s p o n d e n c e: A Useful Form of Pycnometer for Determining the Specific Gravity o f Semi-Solid Bitumens... 475

The Determination on Zinc b y Weighing as Sulphate... 476

The Preparation o f Gooch Crucibles for Asphalt Analysis 477 The Determination of Oxides of Iron and Alumina in Florida Phosphates... 477

Lead Number of Vanilla E xtracts... 478

The Measurement o f Crude Sulphuric A cid ... 479

Method o f Avoiding Emulsions in Organic Analysis... 479

An Electrically Heated Incubator...480

Loss o f Alcohol from Liquids Low in Alcohol... 481

Bureau o f Standards Analyzed Samples... 481

Bo o k Re v i e w s a n d No t i c e s:

Jahrbuch des Vereins der Spiritus-Fabrikanten in Deutsch

land des Vereins der Stärke Interesenter in Deutschland,

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vi

and Vcrcins Dciitscher Kartoffeltrockner; Tables of Properties, o f Over 1500 Common Inorganic Substances;

Introduction to the Chemistry and Physics o f Building Materials; Practical Testing o f Gas and Gas Meters;

The Smokeless Combustion of Coal in Boiler Plants 481 Ne w B o o k s ... 4 8 3

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s:

American Chemical Society, Detroit Meeting; Program of the Fortieth General Meeting of the American Chemical Society Held at Detroit, Michigan; American Institute

o f Chemical Engineers; Twenty-Sixth Annual Con

vention of the Association o f Official Agricultural Chem

ists; Seventh International Congress o f Applied Chem

istry London, May 27th, to June 2nd, 1909; Abstracts from the Seventh International Congress o f Applied

Chemistry, London, 1909... 485

P e r s o n a l N o t e s...494

R e c e n t P a t e n t s... 495

I n d u s t r i a l a n d T r a d e N o t e s ... 498

O f f i c i a l R e g u l a t i o n s a n d R u l i n g s . . . ; ... 499

AUGUST. Ed i t o r i a l s: The Detroit Meeting...505

The Limitations of the Chem ist. ... 505

The Chemist and the Public...506

Or i g i n a l Pa p e r s: Oil Shales o f America. B y Charles Baskerville and W . A. Hamor... 507

The Manufacture of Anhydrous Chlorin from Moist Dilute Gases and Its Industrial Application in Chlorin De taining. B y Elmer A. Sperry... 511

The Determination o f Volatile Combustible Matter in Coke and Anthracite. B y Porter W . Shimer... 518

Rapid Analysis of Babbitt Metal. B y Percy H . Walker and H. A. W hitm an... 519

The Theory o f Fractional Distillation. B y Warren K . Lewis. . . 522

Manganese in Some of Its Relations to the Growth of Pine apples. By W . P. Kelley... 533

Method for Determining Sodium Benzoate in Ketchups or Other Food Materials. B y William E. H illyer... 538

Economic Reasons for the Reduction o f Milk to Powder. B y Lewis C. Merrell... 540

On Soluble, Fusible, Resinous Condensation Products of Phenols and Formaldehyde. By L. H. Baekeland... 545

Aconite. B y Frank O. T ay lor... 549

The Use of Temperature Corrections in the Polarization of Raw Sugars and Other Products upon Quartz Wedge Saccliarimeters. B y C. A. Browne... 567

Chemistry of Flesh.— A Preliminary Study o f the Effect of Cold Storage upon Beef and Poultry. B y A. D. Emmett and H. S. Grindley... 580

Ad d r e s s e s: Pine Products From Pine Woods. By John E. Teeple... 597

No t e s a n d Co r r e s p o n d e n c e: On Industrial Fellowships... 600

An Accurate and Rapid Measuring D evice... 603

The Determination o f Fat in Cheese by* the Babcock T est 604 Determination o f Carbon Bisulphide in Benzol... 406

Two Convenient Devices for Use in the Microscopic Study of Opaque O bjects... 605

Soluble Arsenic in Mixtures o f Lead Arsenate and Lime Sulfur Solution... 606

Manganese in Steel... 607

N e w B o o k s ... 607

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: American Chemical Society, Detroit Meeting; Seventh In ternational Congress o f Applied Chemistry, London, May 27th, to June 2nd, 1909; American Institute of Chemical Engineers; National Fertilizer Association 610 R e c e n t P a t e n t s... 625

SEPTEMBER. Ed i t o r i a l s: Industrial Incompatibilities... 635

Committees... 635

Or i g i n a l Pa p e r s: The Ash of Coal and Its Relation to Actual or Unit Coal Values. By S. W . Parr and W . F. W heeler... 636

The Technical Application o f Titanium. B y Isador Ladoff. . . 642

Vacuum Evaporation. B y P. B. Sadtler... 644

Recovery of Glycerine b y the Twitchell Process Compared with the Recovery of Glycerine b y W a ste. Soap Lye Methods. B y O. T. Joslin... 654

Hygienic Significance of Sulphur in Gas. B y F. E. Galla- pher... 656

Moisture Discrepancies in Phosphate R ock o f the Pacific. B y Carlton C. James... 657

The Analysis o f Lead Arsenate for Water-Soluble Impuri ties. By Roger C. Griffin... 659

On the Volumetric Estimation o f Uranium and Vanadium. B y Edward De Mille Campbell and Chas. E. Griffin 661 O f the Influence o f the Temperature of Burning on the Rate of Hydration of Magnesium Oxide. B y Edward De Mille Campbell... 665

Free Lime in Portland Cement. A Mill Study. B y Arthur G. Smith... 668

Copper-Clad Steel— A New Metallurgical Product. B y W irt Tassin... 670

A Series of Parallel Determinations with the Mahler and Parr Calorimeters. B v S. W . Parr and W . F. W heeler.. . 673

The Determination o f Phosphorus in Flesh. B y P. F. Trow bridge... 675

Anti-Putrescent Effects o f Copper. B y Alfred Springer, Ph.D., Assisted b y Alfred Springer, J r ... 676

No t e s a n d Co r r e s p o n d e n c e: Limitations o f Starch as an Accelerator... 678

Fire Test as Gauge o f Danger for Kerosene... 679

Moisture Content of Butter... 679

Bo o k Re v i e w s a n d No t i c e s: • Sprechsaal Kalender for the Ceramic, Glass and Allied In dustries; The Testing and the Properties o f Sand-Lime Bricks... 680

N e w B o o k s... 680

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: Seventh International Congress o f Applied Chemistry, London, May27th, to June 2nd, 1909... 682

R e c e n t P a t e n t s ...; ... 682

OCTOBER. Ed i t o r i a l s: The Moisture Determination... 685

Or i g i n a l Pa p e r s: The Bag House and Its Recent Applications. B y W . C Ebaugh... 686

A Comparison of Methods for the Determination o f Sulphur in Coal. B y S. W . Parr. W . F. Wheeler and Ruth Berolzheimer... 689

Studies in the Uses o f Finely Divided Silica. B y S. W . Parr, T . R. Ernest and W . S. Williams... 692

Cyanidation o f Silver Minerals. B y Theo. P. H o lt... 694

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C O N TE N TS . vii

The Estimation o f Pyridine in Aqua Ammonia. B y A. C.

H oughton... 698

Flour Bleaching, Its Relation to Bread Production and Nu trition. B y John A. Wesencr and George L. Teller 700 The Titanium Arc. B y Isador Ladoff... 711

A Rapid Method o f Determining the Percentage o f Casein in Milk. B y T. Brailsford Robertson... 723

Changes in the Composition o f the Skeleton o f Beef Animals. By P. F. Trowbridge and F. W . W oodm an... 725

Obituary, Emil Chr. Hansen... 733

No t e s a n d Co r r e s p o n d e n c e: Electrotitrimeter... 734

The Technical Determination of Caoutchouc in Guayule 735 Recent Investigations of Fats and Oils... 736

Corrected Quality Figures... 736

A Modified Kjcldahl Connecting B ulb... 737

A Simplified Combustion Crucible... 738

Note on a Rapid Cooling Electrically Heated Combustion T u be... 739

Home-made Electric Furnace... 741

Bo o k Re v i e w s a n d No t i c e s: The Lead and Zinc Pigments; The Mineral Content of Illinois W aters... 742

N e w B o o k s... 742

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: Association o f State and National Food and Dairy Depart ments; Association of Official Agricultural Chemists... 742

R e c e n t P a t e n t s... . 744

E r r a t a... 750

NOVEMBER. Or i g i n a l Pa p e r s: The Chemical Examination o f Asphaltic Material. B y S. W . Parr, Brainerd Hears and D. L. Weatherhead... 751

Paint and Varnish Coatings as Accelerators in the Corrosion o f Metals. B y William H. Walker and Warren K . Lewis... 754

The Carter Process o f W hite Lead Manufacture. B y J. S. Staudt... 758

Composition o f the Fat of Beef Animals on Different Planes of Nutrition. (First Paper). B y C. R. Moulton and P. F. Trowbridge... 761

A Volumetric Method for the Determination o f Casein in Milk. B y Lucius L. Van Slyke and Alfred W . Bos- w orth... 768

On the Relation o f Native Legumes to the So;l Nitrogen of Nebraska Prairies. B y F. J. Alway and R. M. P ick n ey .. . . 771

Suggested Standards for Maple Sugar and Syrup. B y H. W. Cowles, J r ... 773

Ad d r e s s e s: The Need o f Methods o f Analysis o f Pharmacopoeial Articles. B y B. L. Murray... 775

Bo o k Re v i e w s a n d No t i c e s: Metallography... 776

DECEMBER. Or i g i n a l Pa p e r s: On the Chemistry o f Certain Algae o f the Pacific Coast. By David M .B a lc h ... 777

Nitrates in Boiler-Waters. B y George S. Jamieson... 787

Crude Petroleum as a Reducing Agent for Zinc Ores. B y Harry*H. Hughes and Harrison H ale... 788

Tincture o f Iodine. By Azor Thurston... 789

On the Determination o f Potassium b y the Cobalti-Nitrite Method. B y L. T.: Bowser : ... 791

A Method for the Determination of Citral in Lemon Extracts and Lemon Oils. B y R. S. Hiltner... 798

The Influence o f Shade upon the Composition o f Plants. B y R. W . Thatcher... SOI Potassium-Iodidc-Starch Paper. B y C. G. Storm ... 802

Potash Tests in Commercial Fertilizers. B y J. E. Brccken- ridge... 804

Ad d r e s s e s: The Dynamic Viewpoint o f Soils. B y Frank K . Cameron 806 No t e s a n d Co r r e s p o n d e n c e: Experiments to Find, if Possible, the Potash in Fertilizers Hav ing the Potash from Carbonate o f Potash... 810

Note on a New Modification o f the Kipp Gas Generator 811 Note on the Loss o f Alcohol from Liquids Low in Alcohol 812 A Rapid Method for Determination of Specific Gravity of Coal... 813

Liquid Mixtures for Maximum and Minimum Thermom eters... 813

The Rapid Determination of Manganese in Steel... 812

A Modified Kjeldahl Connecting B ulb... 814

Bo o k Re v i e w s a n d No t i c e s: Reinforced Concrete in Europe; Laboratory Notes on Iron and Steel Analyses'; Alloys and Their Industrial Applica tion; Tanners and Chemists Handbook; Chemical Con version Tables for Use in the Analysis o f Commercial Fertilizers, Cottonseed, Iron and Food Products; Transac tions o f the American Institute o f Chemical Engineers; Practical Points for Practical Brewers; Prevention of Industrial Accidents; Briquetting Tests... 814

Sc i e n t i f i c a n d In d u s t r i a l So c i e t i e s: American Institute o f Chemical Engineers, Philadelphia Meeting; American Society for Testing Materials; Ameri can Chemical Society, Boston Meeting... 816

I n d e x f o r t h e Y e a r 1909 ... 821