38 HATCH EXPERIMENT STATION. [Jan. 



Part I. — The Work op the Year. 



J. K. LINDSEY. 



1 . CORRE SPONDENCE . 



The general character of the correspondence has been 

 much the same as in former years, and the amount has been 

 a})proxmiately 4,000 letters and postals, in addition to some 

 1,000 circulars relative to adulterated mixed feeds. 



2. General Laboratory Work. 



The work in the laboratory has been of the same character 

 as formerl3\ The number of determinations of butter fat in 

 milk has greatly increased. 



There have been sent in for examination 104 samples of 

 water, 773 of milk, 1,779 of cream, 2 of butter and 153 of 

 feed stuffs. In connection with experiments by this and 

 other divisions of the station, there have been analyzed, in 

 whole or in part, 234 samples of milk and cream and 530 of 

 fodders and feed stuffs. There have also been collected and 

 tested under the provision of the feed law 686 samples of 

 concentrated feed stuffs. This makes a total of 4,261 sub- 

 stances analyzed during the year, as against 3,897 last year 

 and 3,240 in the previous year. "Work on the availability 

 of organic nitrogen, not included in the above, has been 

 done for the Association of Official Agricultural Chemists. 

 In addition, 20 candidates have been examined and given 

 certificates to operate Babcock machines, and 2,026 pieces 

 of glassware have been tested for accuracy, of which 200 

 pieces, or 9.87 per cent., were condemned. 



3. Character of Laboratory Work. 



(a) Wate7\ 



In accordance with instructions from the experiment station 



committee, this department continues to charge the sum of 



$3 for a sanitary analysis of water. The number of samples 



