Wilson — The Inheritance of Milk- Yield in Cattle. 97 



Thus in nearly eveiy case allowance can be made for age ; and abnormally 

 long or short lactations can be brought to the normal. Abortions, 

 inflammation of tlie udder, and similar mishaps are frequently mentioned, 

 and can also be taken into account. 



It cannot be expected that the normal yield of every cow can be estimated 

 ju'ecisely ; but approximate accuracy can be attained in most cases, and, as 

 will be seen, the variations are so wide that approximate accuracy is enough. 

 Where there is some doubt it is indicated, but it is never, or very seldom, 

 great enougli to put a cow in her wrong grade. 



[Eecords of Eed Danish Cows and their Descendants. 



SCIENT PEOO., K.D.S., VOL. XIII., NO. VII. 



