Note 4 — Chapter II
Reading edition
N. Y. Exp. Sta. Rept. 1891, pages 143-162, 316-318.
Wis. Exp. Sta. Rept. 1890, pages 238-247.
Van Slyke, L. L., Conditions affecting the proportions of fat and protein in cow's milk, Jour. Am. Chem. Soc., 30 (1908), no. 7, pages 1166-1186.