5 12 Pasteurisation of Milk fo* Butter-making. 



for more than two years, and the loss in germinating power 

 during this period was found to be very slight. It should 

 not, however, be overlooked that in all these experiments the 

 seeds were stored under very favourable conditions, which 

 cannot always be ensured in practice, so that equally satis- 

 factory results are not to be, as a rule, expected. 



If clover and grass seeds are to be kept, care should be 

 taken that they show a high percentage of germination when 

 gathered, that they are stored free from moisture, protected 

 where possible from draughts, and kept at an even and cool 

 temperature. 



[Wiener Landwirtschaftliche Zeitung, iSlli January, 1902. \ 



The Pasteurisation of Milk for Butter-making. 



The following account of a series of experiments on the 

 pasteurisation of milk for butter-making has been published 

 in the Annual Report of the Department of Agriculture 

 of Ontario for 1900, vol. i. The experiments were conducted 

 at the Ontario Agricultural College where vats of milk were 

 heated before separating to various temperatures rang- 

 ing between 140 0 and 2 00 3 ; and the results were com- 

 pared with heating vats of similar milk to a temperature 

 between 90 0 and ioo° before separating. In all the trials the 

 milk was thoroughly mixed in a large vat, then equally 

 divided, and one-half was heated to the temperature of 90 0 

 to 100 0 , and the other half to temperatures between 140° and 

 200 0 . The milk was received at the dairy at temperatures 

 between 50 0 and 70 0 . 



The following summary is given of the main results 

 obtained : — 



Milk heated to a temperature between 140 0 and 200 0 before 

 being separated left a greater proportion of fat in both the 

 skim-milk and the butter-milk than milk separated at 90 to 

 ioo°. The cream from the milk separated at the higher 

 temperatures contained a higher percentage of fat, was less in 

 bulk, churned in less time, and produced slightly more butter. 

 There was more sediment or u mud " in the separator bowl 



