68 EXPERIMENT STATION. [Jan. 



cniltnral Cheiiiists in a study of nicthods for the determination 

 of the various ingredients in condensed milk. 



4. It has co-operated with the Association of Official Agri- 

 cultural Chemists in a study of methods for the determination 

 of total nitrogen. 



5. In connection with the experimental Avork of this and other 

 departments of the experiment station, this division has made 

 ]iartial analyses of 191 samples of milk, 157 samples of cattle 

 feeds and 520 samples of agricultural plants. 



(/) Testing of Pure-bred Cows. 



The work of testing cows for the various cattle associations 

 has increased considerably during the past year. At the pres- 

 ent time two men are kept on the road a greater part of the 

 time on work in connection with the Jersey, Guernsey and 

 Ayrshire tests. The rules of the above associations require the 

 presence of a supervisor once each month at the farms where 

 animals are on test. The milk yields noted by the supervisors 

 at their monthly visits are used in checking up the records re- 

 ported by the owners to the several cattle clul)s. The Babcock 

 tests obtained at that time are likewise reported and used as a 

 basis for computing the butter-fat yield for that month. 



The Holstcin-Friesian tests are of much shorter duration, 

 usually seven or thirty days, and require the presence of a super- 

 visor during the entire test. These tests give rather irregular 

 enqdoyment to a nund^er of men during the winter months. On 

 account of the uncertainty of tlu^ work such men are difficult 

 to obtain, but thus far it has not been necessary for the experi- 

 ment station to refuse an application. 



During the past year 1 seven-day and 33 yearly Guernsey, 

 5 seven-day and 66 yearly Jersey, and 8 yearly Ayrshire tests 

 have been comjdeted. For the Ilolstein-Friesian association 

 77 seven-day, 3 fourteen-day, 8 thirty-day and 1 sixty-day tests 

 have been completed. There are now on test for yearly records 

 80 Jerseys, 29 Guernseys, 9 Ayrshires and 1 Ilolstein. 



