CHEMICAL DIVISION. 



I. MILK, 



Since a large share of the chemical work of this station con- 

 sists of the analysis of milk, a description of the methods used, 

 and a tabulation of all of the results of the year is appropriate in 

 this bulletin, even though many of these results have been pub- 

 lished in other bulletins. 



The topics considered are : 



i. Description of methods. 



2. Comparison of asbestos and paper methods. 



3. Comparison of results by Dr. Babcock's centrifugal method 

 for the determination of fat in milk, and the gravimetric method. 



4. Tabulation of results on fat and solids in milk from cows on 

 various- rations. 



5. Tabulation of results on cream raising by dilution, with ad- 

 ditional data. 



6. Tabulation of results on variations in fat of milk served to 

 customers in dipping from cans. 



7. Miscellaneous analyses. 



1. METHODS OF ANALYSIS. 



Dr. Babcock's gravimetric asbestos method is used in this lab- 

 orator) 7 ; instead of the test tubes, fodder tubes, as described by 

 Prof. Caldwell in Bulletin XII of this station are used. For dry- 

 ing the milk, the same apparatus is made use of as described in 

 that bulletin, except that air is used instead of hydrogen. The 

 tubes are especially adapted to making a large number of dupli- 

 cate determinations of fat and solids. A reference to the cut and 

 description, will at once show their particular fitness for this kind 

 of work. 



