82 



EXPEEIMENT STATION RECOKD. 



to 12 lbs. In other respects the conditions of the experiment were 

 uniform. The following table summarizes the principal data: 



liesults of feeding different <imou)its of grain to milcli cow.^. 



Lot A: 



Period I {8 lbs. grain) 



Period II (12 lbs. grain) 



Period III (8 lbs. grain) 



Average of periods I and III 

 Lot B: 



Period I (8 lbs. grain) 



Period II (8 lbs. grain) 



Period III (8 lbs. grain ) 



Average of periods I and III 



Food consumed. 



Silage. Hay. Grain 



Lbs. 



3,666 



3,754 



3,573 



3,620 



3,876 

 4,294 

 4,180 

 4,028 



Lbs. 

 500 

 336 

 336 



418 



500 

 336 

 336 



418 



Lbs. 

 672 



1,008 

 672 

 672 



Total production. 



Lbs. 

 1,811.3 

 1,739.7 

 1,654.5 

 1,732.9 



672 2,135.1 



672 1,976.3 



672 1, 991. 6 



672 2,063.4 



Pat. 



Lbs. 



86.91 



85.83 



83.10 



85.01 



92.70 

 87.27 

 93.18 

 92.94 



Cost of Cost of 



food per food per 



100 lbs. pound of 



milk. fat. 



Cent<. 

 54. 

 67. 

 56. 

 55. 



47. 

 50. 

 49. 



Cents. 

 11.3 

 13.8 



n.2 



11.3 



10.9 

 11.4 

 10.6 

 10.8 



The results are discussed at some length. The ration containing 12 

 lbs. of grain was considered as fed at a considerable loss as compared 

 with the ration containing 8 lbs. of grain. No increase in the live 

 weight of the animals nor favorable after effects on the production of 

 miilk and butter could be attributed to the additional amount of grain 

 fed lot A during the second period. The work is considered as 

 preliminary. 



Protecting co^vs from flies, W. L. Carlyle ( Wisconsin Sta. Rpt. 

 1899, 2)]j. 92-96). — A brief account is given of the appearance and life 

 history of 2 species of flies troublesome to cattle, the common stable 

 fl}^ {Stomoxys calcitrans) and the horn fly {Tlicmatobia semtta). Pro- 

 tection from the horn fly ma}^ be secured by spraying cows with various 

 substances for this purpose, or bv rubbing into their hair some greasy 

 substance, such as fish oil with some oil of tar and sulphur added. 

 Means of this kind and also blanketing were found useless against the 

 more numerous stable flies. 



An experiment was conducted to determine the relief from flies by 

 stabling. Fourteen cows were divided into 2 lots as nearly equal in 

 every respect as possible. During the daytime lot 1 was kept in a 

 small paddock having an abundance of shade, and lot 2 in a comfortable 

 stable provided with screen doors and windows. In other respects the 

 2 lots received the same treatment. The cows in lot 1 were constantl}' 

 on the move fighting flies, while those in lot 2 were practically free 

 from them. During the 4 weeks which the experiment lasted lot 2 

 (stabled) consumed 835 lbs. more of green sorghum and sweet corn 

 than lot 1 and lost on an average 19 lbs. more in live weight per cow. 

 Comparing the results of the first 2 weeks of the experiment with the 

 results of the 2 weeks preceding, the yields of milk and butter fat of 

 lot 1 decreased respectively 40.4 and 2.16 lbs., and of lot 2, 50. T and 

 0.81 lbs. Similar results were obtained in comparing the first and 

 fourth weeks of the experiment. 



