50 a EXPERIMENT STATION. [Jan. 



The Holstein tests, usually based on a seven or thirty day 

 period, require the presence of a supervisor during the entire 

 test. It is becoming increasingly difficult to secure men for this 

 work, as it does not warrant continuous employment. During 

 the year 23 different men have been employed in these shorter 

 tests, and 158 seven-day, 31 fourteen-day, 38 thirty-day, and 

 1 sixty-day tests, making a total of 228, have been completed. 

 This work was conducted at 29 different farms. 



4. Numerical Summary of Laboratory Work, December, 

 1916, TO December, 1917. 



There have been received and tested 66 samples of water, 

 744 of milk, 631 of cream, 3 of ice cream, 1 of oleomargarine, 

 1 of condensed milk, 202 of feedstuffs, 198 of fertilizers and 

 fertilizer by-products, 22 of lime products, 289 of soils for lime 

 requirements, 5 of soils for water soluble matter, 2 tests for 

 arsenical poisoning, 1 of slum gum, 2 of vinegar, 1 of coal, 8 of 

 lime-sulfur, 2 of arsenate of lead, 1 of Paris green, 2 of fruit 

 preserves, 14 of strawberries and 10 miscellaneous. 



The fertilizers officially collected numbered 1,047, and the 

 cattle feeds, 1,082. There have also been tested, in connection 

 with experiments in progress in the several departments of the 

 station, 266 samples of milk, 152 of cattle feeds, 50 of faeces, 

 8 of urine, 157 of rape, 838 of millet seed or straw, and 30 of 

 soils. The above totals 5,835 samples, and does not include 

 the work of the research section nor that required by the dairy 

 law. 



