1904.] 



PUBLIC DOCUMENT — No. 33. 



59 



But little dift'erencc could be noted in the body of the 

 butter produced by both herds during the fourth or corn 

 meal period. At an interior temperature of 60° F. it was 

 not possible to detect any variation. After the butter had 

 stood twenty-four hours in the same room, and showed an 

 interior temperature of TG^ F., Herd II. butter appeared to 

 be a trifle softer than Herd 1. butter. The difference was 

 certainly not at all pronounced ; both lots would be said to 

 possess a hard, firm body. 



Tai'.le X. — Degrees of Penetration {Millimeters). 



[Each nuni))er represents results with one print.] 



By degrees of penetration is meant the number of milli- 

 meters a small glass plunger loaded with mercury will 

 penetrate into butter when dropped for a definite height. 

 Unfortunately, through a misunderstanding, the tests of the 

 butter produced by the two herds in the first period were 

 made a temperature of 33° F., so that the plunger had little 

 opportunity to penetrate. In the other periods the butter 

 was taken from the refrigerator and allowed to stand in the 

 dairy room until it had acquired the room temperature. It 

 will be seen that both in the second and third periods, and 

 particularly in the latter, the butter produced by Herd II. 

 was noticeably softer and more yielding than the product 

 of Herd I. In the fourth period little difference was ob- 



