Potash
Potash deposits in Spain. Hoyt S. Gale. (U.S. Geological survey. Bul. 715—A) 16p pa ’20
Potash deposits of Alsace. Hoyt S. Gale. (U.S. Geological survey. Bul. 715—B) 39p pa ’20
Poultry
Care of baby chicks: boys and girls poultry club work. (U.S. Agric. dept. Department circular 14) 7p pa ’19
Common poultry diseases. D. M. Green. (U.S. Agriculture dept. Farmers’ bul. 114) 8p pa ’20
Housing farm poultry. A. G. Philips. (Purdue university. Agricultural experiment station. Circular 98) 22p pa ’20 Lafayette, Indiana
How to select good layers. Frank E. Mussehl. (Nebraska, Agricultural experiment station. Circular 12) 8p pa ’20 Lincoln, Nebraska
Improving mongrel farm flocks through selected standard-bred cockerels. William A. Lippincott. (Kansas. Agricultural experiment station. Bul. 223) 48p pa ’20 Kansas State agricultural college, Manhattan, Kansas
Incubation of hens’ eggs. Harry M. Lamon. (U.S. Agriculture dept. Farmers’ bul. 1106) 8p pa ’20