This is a cost study of three aged grade cows--E-10, E-11, and E-13--handled under identical conditions on the Dairy Experimental Farm. The three cows have been treated exactly the same since they came into the herd, all of the feed being weighed to each cow and the feed ref used weighed back. Each milking has been weighed and sampled daily; butterfat tests have been made every ten days.
Bateman, George Q., "Circular No. 75 - Selecting Dairy Cows: Appearance Less Important than Performance" (1928). UAES Circulars. Paper 68.