APPENDIX 
REFERENCE BOOKS. 
The publications here listed are specifically referred to in the 
text and must be consulted in order to obtain the information pur- 
posely omitted in the bulletin because of want of space. This 
library of reference books will be supplied by the State agricultural 
colleges and loaned by them as a unit to each class. 
Alfred Vivian, 1906. 
T. L. Lyon, E. O. Fippin, and H. O. 
1910. 
1. First Principles of Soil Fertility 
2. The Soil. F. H. King. 1896. 
3. Soils, Their Properties and Management. 
Buckman, 1915. 
4. Soils and Fertilizers. Harry Snyder, 1908, 3. ed. 
5. Soil Fertility and Permanent Agriculture. C. G. Hopkins. 
6. The Fertility of the Land. I. P. Roberts. 1909, 3. ed. 
7. Fertilizers and Crops. L. L. Van Slyke. 1912. 
8. Practical Farm Drainage. C. G. Elliott. 1908, 2. ed. 
9. Chemistry and its Relations to Daily Life. Louis Kahlenberg and E. B. Hart. 
1913. 
10. Dry Farming. J. A. Widtsoe. 1913. 
11. Yearbook of the United States Department of Agriculture. 1913. 
12. Manures and Fertilizers. H. J. Wheeler. 1913. 
13. Soils. E. W. Hilgard. 1910. To be included when classes are conducted in 
arid regions. 
Any unabridged dictionary. 
LIST OF APPARATUS AND SUPPLIES REQUIRED. 
APPARATUS. 
12 Coddington or other cheap hand lenses. 
12 long pickle bottles with corks. 
6 wide-mouthed bottles with corks. 
24 one-inch cubes. 
6 two-gallon crocks or jars. 
6 one-pint glass fruit jars. 
6 jelly glasses. 
1 balance with weights. 
12 one-pound baking-powder cans. 
2 measures graduated for cubic inches. 
2 small mortars and pestles. 
6 one-quart glass fruit jars. 
6 tin cups. 
6 pie tins. 
6 shallow dishes (saucers). 
6 pieces of f-inch or 1-inch glass tubing 
(2 feet long). 
6 feet small-sized glass tubing. 
3 three-inch unglazed tile. 
4 wooden boxes, 1 foot square and 4 inches 
deep. 
6 small Fahrenheit thermometers. 
1 marble slab, 1 foot square, polished on 
on both sides. 
4 three-gallon crocks. 
24 outline maps of the United States. 
6 porcelain dishes. 
12 one-hole stoppers. 
6 feet rubber tubing. 
1 set of soil sieves. 
Cheesecloth. 
1 package small needles. 
91 
