12 HATCH EXPERIMENT STATION. [Jan. 



determined. The percentage of fat only is determined in 

 cream, unless the quantity of other ingredients is requested. 

 An estimation of the percentage of protein is usually all 

 that is necessary to determine the genuineness of a feed 

 staff. In some cases it is wise to determine the percentage 

 of fat; in others, the percentage of ash and fibre. 



Full information concerning water, milk and cream, how 

 to take samples, etc., will be found in our report for 1800. 

 Special information will be furnished upon application. 



Cattle Feed Inspection. — We have continued the inspec- 

 tion of concentrated feeds during the year, collecting and an- 

 alyzing over 700 samples. A bulletin is alwut to be issued, 

 giving the results of the work accomplished. The better 

 class of feeds is practically free from adulteration. Some 

 manufacturers and jobbers are still disposed to put cotton- 

 seed meal mixed with ground hulls upon the market, marked 

 simply cotton-seed meal. Mixed feed, so called, consist- 

 ing principally of wheat bran together with several hundred 

 pounds of fine or flour middlings to the ton, is beginning 

 to be adulterated with wheat hulls, ground corn cobs, etc. 

 This material ought to be accompanied by a guaranty to as- 

 sure the purchaser of its purity. Many very inferior oat 

 feeds, containing 50 to 60 per cent, of oat hulls, are still on 

 sale. They are very expensive at the price asked for them. 

 These inferior oat feeds are often used by millers to mix 

 with cracked corn, the resulting product being sold as 

 provender. It is quite inferior to a mixture of genuine 

 ground oats and corn. New feeds are constantly coming 

 into the market, most of them 1)y-products from different 

 industries. The writer is convinced that the time is nearly 

 at hand for a change in the present feed law, making it con- 

 form to the laws in the other New England States. 



Metliods of Analysis. — This department has co-operated 

 with the Association of Official Agricultural Chemists in in- 

 vestigating different methods of analysis, with a view to their 

 improvement. During the present year investigations have 

 been made relative to the best methods of determining 

 starch, pentosans and galactan in feed materials, and of 

 casein and albumin in milk. Work of this character cannot 



