AND COLLEGE, PUSA, FOR 1914-15. 29 



X. Milk. 



Detection of added water in milk. The value of the 

 freezing point of milk as a means of detecting added water 

 was referred to in my last annual report. It was there 

 explained that the value of the test could only be given 

 serious weight after determining the freezing point of a 

 considerable number of milks of known purity, and if the 

 variation were then found to be sufficiently small. 



I took the opportunity when on tour to apply the test 

 to a further number of milks at dairy farms, and although 

 the variation of freezing point among milks of Indian 

 cattle is greater than has been found elsewhere, there is no 

 doubt that it forms a much more delicate test for added 

 water than those hitherto employed. It is proposed to 

 publish a note on the subject shortly. 



XI. Programme of work for 1915-16. 



Major 1 subjects : — 



1. Records of the amount and nature of drainage water 

 from fallow land, and land bearing crops are maintained. 



2. Experiments on possible improvements in the refin- 

 ing of saltpetre will be continued. 



3. The relation between the transpiration of water by 

 plants and the assimilation of plant material during the 

 period of growth will be examined. 



4. An examination of the proportion of starch in some 

 of the Indian starch producing crops will be made and 

 their possible utility from the manufacturing standpoint 

 will be considered. 



Minor subjects : — 

 None. 



XII. Publications. 



] . Indian Village Ashes as a Source of Crude Potash Salts, by 

 J. Walter Leather. The Indian Trade Journal, xxxriii, 

 p. 132. 



