[210] Bull. 128, Wis. Expt. Stat., Sept. 1905.
[211] Babcock and Russell, 18 Rept. Wis. Expt. Stat., 1901.
[212] Harding, Rogers and Smith, Bull. 183, N. Y. (Geneva) Expt. Stat., Dec., 1900.
[213] Guillebeau, Landw. Jahr., 1890, p. 27.
[214] Freudenreich, Füehl. Landw. Ztg., 43:361.
[215] Harrison, Bull. 123 Ont. Agr'l. Coll., May, 1902.
[216] Bull. 183, N. Y. (Geneva) Expt. Stat., Dec. 1900.
[217] Connell, Bull. Canadian Dept. of Agr., 1897.
[218] Schmöger, Milch Zeit., 1883, p. 483.
[219] De Vries, Milch Zeit., 1888, pp. 861, 885.