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"McIntosh Lanterns Are Honest Lanterns."

Vitalize

our lectures, by showing pictures of the processes you are
discussing.

In Chemistry, you can show industrial processes which
are based on applied Chemistry: Soap, Rubber, Asphalt,
Paint, etc.

In Botany and Zoology; Life Cycles, Ecology, Dissections,
Natural History.

In Geology; Weathering, Work of Water, Rivers and
Valleys, Snow and Ice, Ocean, Vulcanizm, Sedimentation,
etc.

In Physics; Mechanics, Heat, Sound, Light, Magnetism and Electricity.

Lantern slides to illustrate all the above and much more are listed in our catalog S.

And to project these slides there is no lantern like the Automatic Sciopticon, priced, complete with 400 Watt Gas-filled Mazda lamp, at $38.00.

Write for circulars and catalogs and submit your projection problems.

STEREOPTICON

[graphic]

MCINTOSH SUMPANY

410 Atlas Block, CHICAGO, ILL.

[graphic][merged small][merged small][merged small][merged small]

No. 40—500 GRAM AUTOMATIC SCALE Does the work of six ordinary balances. Two models: 500 or 1500

gram capacity. For further information write Detroit Automatic Scale Co.

Detroit, Michigan

Please mention School Science and Mathematics when answering Advertisements.

OF

INDEX BY TITLES.
St.HTJA
cat,

Abrasives, High-Grade. U. S, GEOL. SURVEY..

552
Acoustic Attraction and Repulsion. C. C. KIPLINGER.

346
Agriculture as Presented by Some of the State Normal Schools.
OREN E. FRAZEE...

820

Agriculture or Botany, Which. Vesta Holt.

505

Albert Teachers' Agency, The..

188

Algebra Feed the Allies, Making. FRANK M. Rich..

811

Amendment to the Constitution of the C. A. S. and M. T.

752

American Soldiers, The. ANTOINETTE FUNK...

860

Antifreezing Solutions for Automobile Radiators. BUREAU OP

STANDARDS.

478

Apparatus for Determination of the Thermal Coefficient of Expansion

of Gases. W. R. GODDARD..

605

Aquatic Resources, Exploitation of Neglected. BUREAU
FISHERIES.

473
Articles in Current Periodicals. CHARLES H. SMITH .92, 166

284, 384, 472, 561, 663, 753, 855
Atomic Structure. R. R. RAMSEY.

792
Attainments of High School Pupils in First Year Chemistry, A Study
of the. J. CARLETON BELL.

425
Austrians as a People Detest the Germans, Escaped Officers Say...... 862

B

Bacteria. MARY Wilde.

608

Barberry, Destroy the. DEPT. OF AGRICULTURE.

473

Binomial Coefficient, A Small Table of Values of the. C. H. FORSYTH 142

Biological Laboratory of the DeWitt Clinton High School, Peda-

gogical Experiments from the. GEO. W. HUNTER.

728

Biology Courses upon Grades of University Freshmen in Zoology,
The Influence of High School. H. J. VAN CLEAVE.

483

Biology in the High School. G. H. OBERTEUFFER..

362

Biology in the High School of Tomorrow. HAROLD B. SHINN.

495

Biology, Projects in. GRACE F. Ellis.

607

Biology Teaching, Notes on. B. C. GRUENBERG.

357

Birds Help School Grounds. U. S. DEPT. AGRICULTURE.

759

Black Walnut Wanted. AMERICAN BOTANIST.

680

Bollworm in Mexico, May Fight Pink. DEPT. OF AGRICULTURE 207

Books Received. CHARLES H. SMITH....96, 190, 285, 564, 668, 760, 866

Book Reviews-

A Calendar of Leading Experiments. CHARLES H. Smith.. 670

Advanced Algebra. HERBERT E. COBB....

670

Agricultural Bacteriology. WORRALO WHITNEY

763

Airplane Characteristics. CHARLES H. SMITH.

762

A Laboratory Manual of General Chemistry. FRANK B. Wade.. 482

Analytic Geometry. HERBERT E. COBB......

568

An Elementary Study of Chemistry. FRANK B. WADE.

482

Animal Micrology. Practical Exercises in Zoological Micro-

Technique. WORRALO WHITNEY..

290

A Short History of Science. CHARLES H. SMITH..

567

A Textbook in the Principles of Science Teaching. CHARLES H.

SMITH....

191

A Textbook of Botany for Colleges. WORRALO WHITNEY. 290

A Textbook of Botany for Colleges. W. L. EIKENBERRY.

565

A Textbook of Precious Stones for Jewelers and the Gem-Loving

Public. CHARLES H. SMITH...

568

Automatic Exercises in Arithmetic. HERBERT E. CobB..

98
Botany of Crop Plants. WORRALO WHITNEY..

289
Chemical Apparatus and Chemicals. CHARLES M. TURTON. 567
College Algebra. HERBERT E. COBB...

286
Commercial Algebra. HERBERT E. COBB..

569
Differential and Integral Calculus. HERBERT E. COBB..

286
Economy in Food. CHARLES H. SMITH.

760
Education for the Needs of Life. CHARLES H. SMITH..

566

Elements of General Science. CHARLES H. SMITH...

761

Essentials of Physics for College Students. CHARLES H. SMITH... 761

Examples in Battery Engineering. CHARLES H. Smith..

194

Examples in Magnetism. CHARLES H. Smith.

194

Exercise and Review Book in Biology. WORRALO WHITNEY. 763

General Science Manual. CHARLES H. SMITH...

760

How to Make High and Low Pressure Transformers.

CHARLES

H. SMITH..

192

How to Study. HERBERT E. COBB......

98

Infinitesimal Calculus. HERBERT E. COBB..

672

Junior High School Mathematics. First Course. HERBERT E.

COBB...

286

Junior High School Mathematics. Second Course. HERBERT E.

Совв...

672

Laboratory Manual to Accompany Foundations of Chemistry.

CHARLES M. TURTON..

569

Laboratory Study of Chemistry. C. J. PIEFER..

570

Logarithmic and Trigonometric Tables. HERBERT E. COBB..... 97

Logarithms and Anti-Logarithms. HERBERT E. COBB.....

670

Mammalian Anatomy with Special Reference to the Cat.

WORRALO WHITNEY.

762

Mathematics for Agriculture and General Science. HERBERT E.

COBB....

286

Microbiology. A Textbook of Micro-Organisms, General and

Applied. WORRALO WHITNEY..

290

Mycology and Plant Pathology. WORRALO WHITNEY.

288

Pláne and Solid Geometry. HERBERT E. COBB...

98

Plane and Spherical Trigonometry. HERBERT E. COBB.

568

Plane and Spherical Trigonometry. HERBERT E. COBB..

670

Plane Geometry, Revised Edition. HERBERT E. COBB..

569

Plane Trigonometry, with Tables. HERBERT E. COBB..

670

Predetermination of Prices. HERBERT E. COBB...

674

Principles of Economic Zoology. WORRALO WHITNEY.

763

Problems in General Physics for College Courses. CHARLES H.

Smith...

567

Productive Agriculture. WORRALO WHITNEY.

288

Progressive Chemistry. A Laboratory Manual. Frank B. WADE 866

FRANK

Radio Communication. Theory and Methods. CHARLES H.

SMITH...

194

School Entomology. WORRALO WHITNEY.

287

Science for Beginners. CHARLES H. SMITH..

570

Scientific Method in the Reconstruction of Ninth-Grade Mathe

matics. HERBERT E, COBB.....

674

Second Course in Algebra. CHARLES H. SMITH.

760
Soils and Fertilizers. WORRALO WHITNEY..

288
ony Island-A Plea for its Conservation. CHARLES H. SMITH.. 192

The Cadet Manual. Official Handbook for High School Volun-

teers of the United States. CHARLES M. TURTON..

482

The Carnegie Foundation for the Advancement of Teaching.

CHARLES H. SMITH.

565

The Course in Science. R. W. OSBORNE..

672
The Natural History of Chautauqua. Charles H. Smith.. 567
The Organization of Thought. CHARLES H. Smith..

761
The Teaching of Agriculture. WORRALO WHITNEY.

764

The Third and Fourth Generation. CHARLES H. SMITH..

566

The Vocational Education of Girls and Women. CHARLES H.

SMITH...

762

Third Year Mathematics for Secondary Schools. HERBERT E.

COBB....

97

Botanical and Zoological Material. Hints for Collecting. John L.
DAHL...

52

Botanical Teaching, Opportunity and Obligation in. J. E. KIRK-

579

Botany Laboratory Equipment. WILLARD N. CLUTE .

492

Botany, Which? Agriculture or. Vesta Holt..

505

Boyle's Law Apparatus. _ Ralph C. HARTSOUGH.

349

Burn Bituminous Coals Economically, How to. BUREAU OF Mines 601

1

WOOD.

с

California Science and Mathematics Association, Southern. HARRIET
S. KING...

563

Call to Duty. WAR LOAN REVEILLE.

665

Carolina Tin Deposits. U. S. GEOL. SURVEY..

267

C. A. S. and M. T. Minutes of Biology Section. EstELLE FELDMANN 183

C. A. S. and M. T. Minutes of Chemistry Section. A. C. D.

METZGER..

185

C. A. S. and M. T. Minutes of Earth Science Section. STELLA S.

WILSON..

281

C. A. S. and M. T. Minutes of Mathematics Section. ETHEL JAYNES 282

C. A. S. and M. T. Minutes of the Physics Section. A. BJORKLAND.. 188

C. A. S. and M. T. Treasurer's Report. John H. McCLELLAN.. 182

Central Association of Science and Mathematic Teachers. General

Minutes of the 1917 Meeting of. A. W. CAVANAUGH..

180

Central Association of Science and Mathematics Teachers. Why

One Should Attend the November, 1918, Meeting of the.

HARRY D. ABLES...

746

Central Association Members. CHARLES S. WINSLOW.

666

Centrifugal Force, Formula for. ROSWELL PARISH...

43

Chemistry, Numerical Problems in. JESSE CAPLIN

864

Chemistry Teacher's Opportunity, The. FRANK B. WADE.

307

Citizens of America, To the..

457

Classroom Sayings...

.284, 459, 665

Clay, American Needs for English. U. S. SHIPPING BOARD..

610

Coal, Cannel. U. S. GEOL, SURVEY..

478

Concrete Has Many Uses. U. S. GEOL. SURVEY..

454

Congruent and Similar Triangles, A Comparative Study of.

ROBERT R. Goff..

306

Conservation of Coal. U. S. BUREAU OF MINES..

178
Crippled Soldiers, The Duty of the Employer to the Reconstruction
of the. DOUGLAS C. McMURTRIE...

652

Cut Down on Expense; Live the Simple Life. WAR LOAN REVEILLE 664

D

Daylight Saving in the United States. W. M. GREGORY.

436

Deep Salt Bed. U. S. GEOL. SURVEY..

20
Demonstrative Geometry, The Introduction of. ERNEST B. LYTLE 221
Directory of Science and Mathematics Societies. CHARLES H.
SMITA....

-572, 764

Discussion Method, Mr. Dooley, 2nd, on the. JEAN BROADHURST.... 681

Dyes, Coal Tar. HERMAN WRIGHT..

798

E

Eclipse of June 8, The Solar. WILLIAM B. THOMAS.

534

Economic Geography for the High School, A Unit Course in. J.
PAUL GOODE...

235
Elimination of Waste in the High School, Reply to. JESSIE D.
BRAKENSIEK

48

Erratum.....

..546, 562

Extension Agriculture Work Expanded. DEPT. OF AGRICULTURE.... 234

Extracting Ăny Root of a Number, A Simple Rule for. Otto

DUNKEL

19

F

"Fall” Apparatus, A Simple. A. H. COOPER...

857

Fat for Soap-A Project for the Chemistry Class, Utilizing Waste.... 733

Feldspar in 1917, Production of...

666

First Interest Installment, The. War Loan REVEILLE.

280

Fixation of Atmospheric Nitrogen, Recent Developments in the.

GEORGE W. SEARS..

527

Focusing Lenses, Some Precise Methods of. LEROY D. WELD. 547

Fogs, California Coast. GEOGRAPHICAL REVIEW.

750

Forest and Lumbering References. W. M. GREGORY.

44

Forestry Exhibits and Slides Loaned by the Government.

SERVICE.

367

Forest Service, Classified for Teachers and Students, Publications of

the. FINDLEY BURNS...

716

Formal Discipline, The Doctrine of. Nathan A. HARVEY.

536

Forty-Five Million Barrels of Salt. U. S. GEOL. SURVEY.

94

Fourth Liberty Bond, How to Pay for Your...

779

Fuller's Earth in 1917. U. S. GEOL. SURVEY..

810

Functional Notation, A Suggestive Approach to the Use of the. L.

E. LUNN....

480

G

Garden Increase Estimated to be at Least Two Hundred Per Cent.

DEPT. OF AGRICULTURE

438

Gas Warfare, A Brief Bibliography on. B. J. RIVETT.

667

Genetics to Breeding Problems, The Application of. LEON J. COLE.. 447

Geographical Features, Illustrated by Some Maps of Georgia, A

New Method of Mapping Complex. ROLAND M. HARPER... 699
Geography a Greater Place in the High Schools, Reasons for Giving.
GEORGE D. HUBBARD.....

291
Geometrical Theorem, Proof of. TAKESHI OMACHI.

369
Geometry, Group Recitation in. LENA B. HANSEN..

103
German Super-Gun, Two Methods of Locating the. HARRIS F.
MacNEISH.

626
Germ Plasms of Animals, A Review of Some Recent Attempts to
Influence the. W. M. BARROWS.

152

Grand Canyon, Rocks of the. U. S. GEOL. SURVEY.

166

Graphical Algebra as Applied to Functions of the nth Degree.

FRANCIS E. NIPHER...

603

Graphical Representation of Approximations for Square Root, A.

OTTO DUNKEL....

621

Graphical Solution of Problems, The. Paul H. GEIGER..

433

1 1 1

Graphical Solution of the Equation tat

A. J. H.

A A, A2

V. FINNEY.

203

Graph of ax? +bx+c, The. J. L. PATTERSON.

45

Graph of the Unit Parabola, The. J. R. SAGE, JR.

335

Group Theory, Some. G. A. MILLER....

675

H

Heaving of Pavements by Frost. ENGINEERING AND CONSTRUCTION 456

Help Your Government.

164

High School Science on the Decline? Is. FRED D. BARBER.

454

Honey Production. AMERICAN BOTANIST.

651

I

Insects and Birds to Be Used for Class Work, Containers for.

HATTIE J. WAKEMAN.

841

Insects, Teaching High School Pupils the JEROME ISENBARGER.. 195

Ionization, A Method of Teaching. LEROY F. SWIFT..

46

Iowa Association of Mathematics Teachers. IRA S. Condit..

178

Iron Ore and Pig Iron in 1917. U. S. GEOL. SURVEY....

861

Italian Dirigibles Show 109 Actions with Enemy in One Year.. 865

J

John C. Winston Company, Publishers...

165

K

Kantishna Region, Mineral Resources of the. U. S. GEOL. SURVEY 460

L

Laboratory Efficiency. H. R. Smith...

242
Laboratory Storage and Filing Appliances. W. L. EIKENBERRY...... 500
Lamp Bank, A Convenient. P. C. HYDE

632
Liberty Bonds for Those Bearing 4% Per Cent Interest, Exchange
Your First and Second...

659
Liberty Bonds, Hold Your. TREASURY DEPARTMENT.

863
Liberty Bonds, Why You Must Buy.

454
Liberty Loan Activities...

446
Liberty Loan Subscription..

361
Limitation of the Balance..

587
Logarithms and Some of Their Applications for High School Pupils.
J. S. COUNSELMAN.

21

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