l8o MAINE AGRICULTURAL EXPERIMENT STATION. 1908. 



waste so that nearly all the gluten meals carry less oil than they 

 did a few years ago. 



Gluten feeds differ from gluten meals in that they contain 

 considerably more of the corn bran and hence relatively less 

 protein, fat and digestible carbohydrates, and more of the indi- 

 gestible woody fiber. Gluten products which were formerly 

 quite extensively used in Maine, came to be regarded as rather 

 unsatisfactory forms of concentrated feeds, chiefly because of 

 their uneven composition. 



Buffalo Gluten feed is apparently much more largely used in 

 the State than the other brands and this is sold under a guaranty 

 of 23 per cent protein and 2\ per cent fat, which analysis is well 

 maintained. In only one instance was a sample found running 

 below this guaranty and then only slightly. 



Bay State Gluten feed cannot be depended upon to carry much 

 more than 20 per cent protein, and the Clinton Gluten feed of 

 the Clinton Sugar Refining Company is even poorer than this. 

 Only three samples of Jenks gluten feed were found and these 

 were sold under two guaranties, — one was 2J per cent protein 

 and y\ per cent fat, and the other 36 per cent protein and 5 per 

 cent fat. One sample, with the lower guaranty, was up to the 

 guaranty; — the meal carrying the high guaranty fell far below, 

 and the guaranty was changed by the dealer but not until after 

 considerable of the meal had been sold. 



Warner's Gluten feed is made by the people that make Buffalo 

 gluten feed and closely resembles it in guaranty and analysis. 



COLORING MATTER AND ACID IN GLUTEN FEEDS. 



Because of some complaint and special information received, 

 the gluten feeds on sale in Maine were examined both for acidity 

 and for foreign coloring matters with the results which follow. 

 The acidity was determined by titrating with a tenth normal 

 sodium hydrate and in each instance two grams of the material 

 were used for the determination. The Sostegni and Carpentieri 

 method was used for testing for coal tar color. The results are 

 given in the table which follows. It will be noted that 3 samples 

 of corn meal were also tested as standards for comparison. 



