68 



Hegelund System of Milking. 



and analyses of the " regular " and " residual " milkings were 

 recorded for five cows milked on the evening of June 3rd and for 

 five others on the morning of June 4th, 1902. It was found that 

 after the regular milking, the cows furnished from ro to 3-55 lb. 

 of milk by the second manipulation ; the additional amount of 

 fat varied from O'l to 0*27 lb. ; and the fat content of the residual 

 milk varied from 6 to 15 per cent. Or, calculating the gain as a 

 percentage of the fat obtained at the regular milking, the 

 increase in amount of fat varied from 9/9 to 32*5 per cent., 

 according to the cow. The following table shows the average 

 results from the ten cows : — 



Average amount of milk per cow, regular milking ... ... 25*07 lb. 



„ „ residual ,, ... ... 2*04 



Percentage of butter-fat, regular milking ... ... ... 3*96 per cent. 



., „ residual ,, 8*85 „ 



Amount of fat, regular milking ... ... ... .. '991b. 



„ ,, residual ,, ... ... ... ... ... "i8 



'Total amount of milk per cow ... ... .. ... ... 27 11 ,, 



fat „ 117 » 



;. Percentage of fat in total milk per cow •■■ ... ... 4*33 percent. 



The amount of milk per cow was thus increased by 8'i per 

 cent., and the amount of fat by i8'i per cent. 



The milk record of the herd shows that these ten cows twenty- 

 four hours later gave in all 2607 lb. of milk ; about 10 lb. 

 more than on the day of the trial, seven cows giving more milk 

 and three less. No separate tests were made on this day, but 

 the quantity showed that the thorough emptying of the udders 

 had no tendency to reduce the amount yielded on the following 

 day. 



In view of the information thus obtained, a further trial was 

 ■immediately started to ascertain whether this large increase 

 •would gradually disappear when the method was practised for a 

 ilonger period. Three lots, of eight cows each, as uniform as 

 possible as to period of lactation, age, breed, production of milk, 

 &c, were selected. Lot I. was after-milked during the first and 

 fourth weeks of the experiment, Lot III. during the second and 

 fifth weeks, and Lot II. was after-milked every other day 

 during the first two weeks and last two weeks. The trial lasted 

 five weeks. The summary data of the main experiment are 

 given in the following table : — 



