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"McIntosh Lanterns Are Honest Lanterns."
our lectures, by showing pictures of the processes you are
In Chemistry, you can show industrial processes which
In Botany and Zoology; Life Cycles, Ecology, Dissections,
In Geology; Weathering, Work of Water, Rivers and
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.
410 Atlas Block, CHICAGO, ILL.
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.
Please mention School Science and Mathematics when answering Advertisements.
INDEX BY TITLES.
Abrasives, High-Grade. U. S, GEOL. SURVEY..
Aquatic Resources, Exploitation of Neglected. BUREAU
284, 384, 472, 561, 663, 753, 855
Biology Courses upon Grades of University Freshmen in Zoology,
Automatic Exercises in Arithmetic. HERBERT E. CobB..
Radio Communication. Theory and Methods. CHARLES H.
School Entomology. WORRALO WHITNEY.
Science for Beginners. CHARLES H. SMITH..
Scientific Method in the Reconstruction of Ninth-Grade Mathe
matics. HERBERT E, COBB.....
Second Course in Algebra. CHARLES H. SMITH.
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.
The Course in Science. R. W. OSBORNE..
The Third and Fourth Generation. CHARLES H. SMITH..
The Vocational Education of Girls and Women. CHARLES H.
Third Year Mathematics for Secondary Schools. HERBERT E.
Botanical and Zoological Material. Hints for Collecting. John L.
Botanical Teaching, Opportunity and Obligation in. J. E. KIRK-
Botany Laboratory Equipment. WILLARD N. CLUTE .
Botany, Which? Agriculture or. Vesta Holt..
Boyle's Law Apparatus. _ Ralph C. HARTSOUGH.
Burn Bituminous Coals Economically, How to. BUREAU OF Mines 601
California Science and Mathematics Association, Southern. HARRIET
Conservation of Coal. U. S. BUREAU OF MINES..
Deep Salt Bed. U. S. GEOL. SURVEY..
Economic Geography for the High School, A Unit Course in. J.
Geographical Features, Illustrated by Some Maps of Georgia, A
New Method of Mapping Complex. ROLAND M. HARPER... 699
Graphical Solution of Problems, The. Paul H. GEIGER..
1 1 1
Laboratory Efficiency. H. R. Smith...