36 DAIRYING 



leaving a margin of 20 cents per day or $6.00 per month earned by 

 applying this method of after-milking to a herd of 20 cows. The 

 evidence all shows the great importance of carefully milking each 

 cow dry at every milking. 



K. The Use of Milking Tubes 



189. As a rule milking tubes are only used when a cow has 

 a sore teat or quarter of her udder and hand pressure is so painful 

 that milk cannot be drawn in the usual way. The insertion of the 

 tubes into the cows teats is a painful operation with most cows 

 and a disturbance of this kind will have a great effect on the milk 

 secretion. Babcock reports a trial of milking tubes with 8 cows 

 for seven milkings. Four tubes were used on each cow at once, 

 and after milk stopped flowing from the tubes the cows were 

 hand stripped but no more milk was obtained. Some cows did not 

 object to the milking tubes while others did; but in all cases the 

 milk drawn by means of the tubes contained less butter fat than 

 was obtained by hand milking. There was obtained from the 8 

 cows by hand milking 140 pounds of milk testing 4.7% fat and by 

 use of the milking tubes 134 pounds of milk testing 2.9% fat or 

 6.6 pounds of butter fat by hand and 3.9 pounds by tube milking, 

 or a loss of 2.7 pounds butter fat from the use of the tubes. This 

 shows that they should be used only in case of injury or soreness 

 of the cow's udder. 



L. Effect of Changing Quarters, Dehorning, etc. 



The illustrations previously given in regard to the effect of 

 change of milkers, method of milking, etc., show that the dairy 

 cow is a very sensitive animal, and that the sudden disturbance of 

 her normal quiet life has a depressing effect on her milk production. 

 This sensitiveness is greater in some cows than in others: as a rule, 

 the better the cow the more sensitive she is to any irregularity. 



Certain disturbances seem to have a temporary effect on the 

 milk production, causing a loss of milk and butter fat in the 

 milking immediately following the excitement, but the cows seem 

 to recover from this loss in a short time. 



M. Change of Quarters. 



191. Babcock found that when two cows were taken from 

 their home stable to a neighboring barn one mile away that at the 



