1917.1 PUBLIC DOCUMENT — No. 31. 77a 



4. Numerical Summary of Laboratory Work, December, 

 1915, TO December, 1916. 



There have been received and tested 71 samples of water, 

 679 of milk, 852 of cream, 2 of ice cream, 4 of milk serum, 204 

 of feedstuffs, 197 of fertilizer, 273 of soil, 20 of lime products, 

 37 of slum gum, 6 of organic substances for arsenic, 13 of vine- 

 gar, 2 of coal, 4 of lime-sulfur, 2 of arsenate of lead, 1 of cider 

 for alcohol, 21 of bread and 15 miscellaneous. 



The fertilizer control work involved the collection of 1,398 

 samples; and the feed control, 1,109 samples. There have also 

 been examined, in connection with experiments made by the 

 different departments of the station, 230 samples of milk; 175 

 of cattle feed; ash analysis of 8 samples of corn grain, 8 of cob, 

 4 of stover, and 6 of cow horn turnips; dry-matter determina- 

 tions and total weights were made on 260 samples of millet 

 straw and on 260 of millet seed; 40 samples of the millet were 

 analyzed for nitrogen and potash, 19 for nitrogen and phos- 

 phoric acid, 12 for nitrogen, potash and phosphoric acid, and 

 42 for nitrogen alone; and 48 samples of subsoil for potash and 

 mechanical analysis. The above totals 6,022 samples, and does 

 not include the work of the research section, cow testing or 

 the work under the dairy law. 



