



Elementary Science. 



Austin's Observation Blanks in Mineralogy. Gives detailed studies of 35 com- 



mon minerals. 88 pages. 39 cents. 



BallaPd'S The World Of Matter. A guide to the study of chemistry and mineralogy; 

 adapted to the general reader, for the use as a text-book or as a guide to the teacher 

 in giving object-lessons. 284 pages. Illustrated $ 1.00. 



Clark's Practical Methods in Microscopy. Gives in detail descriptions of meth- 

 ods that will lead the careful worker to successful results. 233 pages. Illustrated. $1.60. 



Clark's HOW tO find the Stars. Helps to an acquaintance with the constellations. 4 7 

 pages, paper. 15 cts. 



Guides for Science Teaching. Teachers' aids in the instruction of Natural History 

 classes in the lower grades. 



I. Hyatt's about pebbles. 26 pages. Paper. 10 cts. 

 11. Goodale's A Few Common Plants. 6i pages. Paper. 20 cts. 



III. Hyatt's Commercial and other Sponges. Illustrated. 43 pages. Paper. 20 cts. 



IV. Agassiz's First Lessons in Natural History. Illustrated. 64 pages, paper. 25 



CIS. 



V. Hyatt's Corals and Echinoderms. Illustrated. 32 pages. Paper. 30 cts. 



VI. Hyatt's Mollusca. Illustrated. 65 pages. Paper. 30 cts. 



VII. Hyatt's Worms and Crustacea. Illustrated. 66 pages. Paper. 30 cts. 



VIII. Hyait's Insecta, Illustrated. 324 pages. Cloth. $1.25 



XII. Crosby's Common Minerals and Rocks. Illustrated. 200 pages. Paper. 40 



cts. Cloth, 60 cts. 



XIII. Richard's first Lessons in Minerals. 50 pages. Paper. 10 cts. 



XIV. Bowditehes Physiology. 58 pages. Paper. 20 cts. 



XV. Clapp's 3o Observation Lessons in Minerals. 80 pages. Paper. 30 cts. 

 XVI. Phenix's Lessons in Chemistry. 20 cts. 

 Pupils' Note-Book to accompany No. 15. 10 cts. 



Shaler's First Book in Geology. 272 pages, illustrated. $1 00. 



Sent by mail postpaid on receipt oj price. 



D. C. HEATH & CO., PUBLISHERS, 



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Zoological Supplies 



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