332 ELEMENTS OF AGRICULTURE 



parentage. The mere fact that the record is written does 

 not prove that the individual is good. 



294. Advanced Registry. One of the most hopeful 

 developments of the system of registry is the taking of 

 performance records. It is not the mere list of ancestors, 

 but their records and the record of the individual, that 

 are of most value. The Holstein-Friesian Association 

 has been most active in this work. Cows are milked for 

 a week or more under the supervision of an official repre- 

 sentative of an agricultural experiment station, and the 

 milk is tested for butter-fat. In order to be admitted to 

 advanced registry, a mature cow must give 12 pounds 

 of butter-fat equivalent to 14 pounds of butter per 

 week. A graduated scale is provided for young cows. 

 Provision is also made for yearly records. This system 

 has been of great service in improving and advertising 

 the l^reed. One can now look up the advanced registry 

 records of the parents and offspring of an animal. (See 

 Fig. 9.) The highest record thus far is 28 pounds 3 

 ounces of butter-fat, or nearly 33 pounds of butter, 1 in 

 one week, made by Colantha 4ths Johanna 1849. This 

 is the world's butter record at the present time. 2 Another 

 Holstein cow produced over 15 tons of milk in a year. 



The Jersey and Guernsey Associations also have sys- 

 tems of advanced registry. 



The principle of performance records should be intro- 

 duced with other pure-bred stock as rapidly as possible. 



J The Holstein-Friesian Association calculates 0.8 of a pound of butter- 

 fat as equivalent to a pound of butter. Good butter will not carry 20 per 

 cent of water. The factor 0.857 pounds is nearer correct. That is, add one- 

 sixth to the butter-fat to get the butter that it will make. This is the 

 method used above. 



'The Holstein-Friesian Yearbook, Vol. VIII, p. 320. 



