174 ANNUAL RErORT OF THE Ofif. Doc. 



To briefly summarize the results obtained by the application of 

 the tuberculin test, 1 herewith give the following table: 



Percentage. 



1904, 20. 2 



1905 



June, 10.8 



November, 5.1 



1906 



April, S.4 



November, ;> . (1 



1907 



April 0. 



1907 



October, . 



1908 



April, 1.4 t 



November, 1,8 



1909 



April, 0. 



1910 



May, 3.3 



1911 



January, 2.5 



It is of interest to know that during a part of the period above 

 mentioned, two bulls which had reacted to the tuberculin test but 

 showed no clinical evidence of tuberculosis, Avere used for breeding 

 purposes in connection with cows in the nmin milking herd. This 

 was done in order to obtain the offspring, as the bulls in question 

 were considered to be of the best Guernsey blood in this country. 

 Both animals during their period of service were kept by themselves, 

 entirely separate from the herd, in a specially constructed barn al- 

 lowing plenty of light and ventilation, with a large exercising yard 

 enclosed by a plank fence 5 feet high. The following rules were care- 

 fully observed in the care of these animals as well as in breeding 

 cows to them: — 



I. The animal is at all times to be kept well isolated from the 



main herd in a specially constructed stable and is to be at- 

 tended by an employee who has no connection with the other 

 cattle. 



II. All utensils used in his care such as buckets, brooms, forks, 



halters, feeding boxes, brushes, currycombs, etc., are under 

 no conditions to be removed from his stable and taken to 

 to another stable unless they are thoroughly cleansed and 

 disinfected with a 5 per cent, solution of creoline or car- 

 bolic acid. 



III. He is to have a special halter and lead pole that must never 



be used for any other animal. 

 VI. A special place preferably close to his stable should be selected 

 for service, and no circumstances should permit him to be 

 taken into the yards or stables of the main herd. 



