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your 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.

MCINTOSH STEREOPTICON

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COMPANY

410 Atlas Block, CHICAGO, ILL.

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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.

OREN E. FRAZEE...

Α

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

Acoustic Attraction and Repulsion. C. C. KIPLINGER.

Agriculture as Presented by Some of the State Normal Schools.

Agriculture or Botany, Which. VESTA HOLT..

552

346

820

505

Albert Teachers' Agency, The..

188

Algebra Feed the Allies, Making.

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

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Apparatus for Determination of the Thermal Coefficient of Expansion
of Gases. W. R. GODdard...

605

Aquatic Resources, Exploitation of Neglected. BUREAU OF

FISHERIES..

473

Articles in Current Periodicals. CHARLES H. SMITH. .92, 166
.284, 384, 472, 561, 663, 753, 855

Atomic Structure. R. R. RAMSEY.
Attainments of High School Pupils in First Year Chemistry, A Study
of the. J. CARLETON BELL
Austrians as a People Detest the Germans, Escaped Officers Say...... 862

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

728

483

Biology in the High School. G. H. OBERTEUFFER..
Biology in the High School of Tomorrow.
Biology, Projects in. GRACE F. ELLIS..

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

Birds Help School Grounds. U. S. DEPT. AGRICULTURE.
Black Walnut Wanted. AMERICAN BOTANIST..

Bollworm in Mexico, May Fight Pink. DEPT. OF AGRICULTURE
CHARLES H. SMITH....96, 190, 285, 564, 668, 760, 866

Books Received.

Book Reviews-

A Calendar of Leading Experiments. CHARLES H. SMITH..
Advanced Algebra. HERBERT E. COBB...
Agricultural Bacteriology. WORRALO WHITNEY.
Airplane Characteristics. CHARLES H. SMITH.
A Laboratory Manual of General Chemistry.
Analytic Geometry. HERBERT E. COBB..

357

759

680

207

670

670

763

762

FRANK B. WADE.... 482

568

An Elementary Study of Chemistry. FRANK B. WADE..
Animal Micrology. Practical Exercises in Zoological Micro-

482

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.

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

567

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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..
Examples in Magnetism. CHARLES H. SMITH..

194

194

Exercise and Review Book in Biology. Worralo WhitNEY.

763

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

570

Logarithmic and Trigonometric Tables. HERBERT E. COBB..
Logarithms and Anti-Logarithms. HERBERT E. COBB.....

97

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

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Principles of Economic Zoology. WORRALO WHITNEY..

Problems in General Physics for College Courses. CHARLES H.
SMITH....

Progressive Chemistry. A Laboratory Manual. FRANK B. WADE 866 Radio Communication. Theory and Methods.

763

567

288

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Scientific Method in the Reconstruction of Ninth-Grade Mathematics. HERBERT E. COBB...

674

Second Course in Algebra. CHARLES H. SMITH..
Soils and Fertilizers. WORRALO WHITNEY..
Stony Island-A Plea for its Conservation.

760

288

CHARLES H. SMITH.. 192

The Cadet Manual. Official Handbook for High School Volun-
teers of the United States. CHARLES M. TURTON..
The Carnegie Foundation for the Advancement of Teaching.
CHARLES H. SMITH...

482

565

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

672

The Natural History of Chautauqua. CHARLES H. SMITH...
The Organization of Thought. CHARLES H. SMITH...
The Teaching of Agriculture. WORRALO WHITNEY.
The Third and Fourth Generation. CHARLES H. SMITH..
The Vocational Education of Girls and Women.

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

WOOD..

579

Botany Laboratory Equipment. WILLARD N. CLUTE...

492

Botany, Which? Agriculture or. VESTA HOLT..
Boyle's Law Apparatus. RALPH C. HARTSOUGH..

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

505

349

с

California Science and Mathematics Association, Southern. HARRIET

S. KING...

563

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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

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

48

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