6. Outlines of the Earth's History Shaler. Appleton & Co., 1898. 



7. Town Geology Kingsley. Appleton & Co. , 1890. 



8. Rocks and Minerals Fairbanks. Educational Pub. Co., 1903. 



9. Great American Industries Rocheleau. Pt. I. Flanagan & Co., 1896. 



10. Longman's Object Lessons Salmon and Woodhull. Longmans, Green & Co , 1894. 



11. First Lessons in Minerals Richards. Heath & Co. 



12. Common Minerals Crosby. Heath & Co. 



13. Thirty-Six Observation Lessons in Minerals Clapp. Heath & Co. 



14. Up and Down the Brooks Bamford. Houghton, Mifflin & Co. 



15. Mineral Resources of the U. S U. S. Geological Survey. 



ib. Economic Geology of the U. S. Ries. Macmillan & Co., 1905. 



17. Story of Glass Hanson. World's Events Pub. Co., 1906. 



18. Drama of Glass Field. Libbey Glass Co., Toledo, O. 



19. Glass Manufacture. Pittsburg Plate Glass Co. 



20. A Contribution to the Natural History of Marl Davis. Mich. Geological Survey, Vol. 8, pt. 3, p. 65, 1903. 



21. The Portland- Cement Industry in Michigan Russell. U. S. Geol. Survey, 22nd Rep., pt. 3, p. 629, 1902. 



22. Elementary Meteorology Waldo. Amer. Book Co., 1896. 



23. About the Weather Harrington. Appleton & Co., 1899. 



24. The Human Body Martin. Holt & Co., 1895. 



25. How to Keep Well Blaisdell. Ginn & Co. 



26. Graded Lessons in Physiology and Hygiene Krohn. Appleton & Co., 1906. 



27. How to Get Strong Blaikie. Harper & Bros. , 1879. 



28. Physical Training for Children Hancock. Putnam's Sons, 1904. 

 29 Nature Study Jackmau. Holt & Co., 1894. 



30. First Lessons in Physical Science Avery and Sinnott. Butler, Shelden & Co. 



31. Physical Science at Home Trowbridge. Appleton & Co., 1898. 



32. The Transportation and Lifting of Heavy Bodies by the Ancients Watkins. Smithsonian Rep. for 



1898, p. 615. 



33. Boy's Book of Inventions Baker. McClure, Phillips & Co. 



34. Stories of Invention Hale. Roberts Bros. , 1895. 



35. A Study of Elementary Magnetism and Electricity by Experiment St. John. T. M. St. John, 1900. 



36. Things a Boy Should Know about Electricity. St. John. T. M. St. John, 1900. 



37. The How and Why of Electricity Child. Electrical Review, 1905. 



38. Electricity in Modern Life Tunzelmann. Scribner & Welford, 1890. 



39. A Century of Electricity Mendenhall. Houghton, Mifflin & Co., 1887. 



LIST OF PERIODIC PUBLICATIONS. 



1. NATURE STUDY REVIEW. 30 Linden St., Geneva, N. Y. $1.00 per annum. 



2. BIRD LORE. Harrisburg, Pa. $1.00 per annum. 



3. CHILD-STUDY MONTHLY. A. W. Vfumford, 203 Michigan ave. , Chicago. $i .00 per annum. 



4. AMERICAN JOURNAL OF PSYCHOLOGY. Clark University, Worcester, N. Y., $1.00 per 



annum. 



5. NATURE STUDY LEAFLETS. Cornell University, Ithaca, N. Y. 



6. NATURE STUDY LEAFLETS. Clark University, Worcester, Mass. 



7. ELEMENTARY SCIENCE LEAFLETS. Agricultural College, Michigan. 



8. LEAFLETS ON NATURE STUDY. Purdue University, Lafayette, Ind. 



9. FARMERS' BULLETINS. U. S. Dept. of Agriculture, Washington, D. C. 



10. PUBLIC HEALTH. State Dept. of Health, Lansing, Mich. 



65 



