34 



choice providing the excess of fat was sufificient to make up the pro- 

 tein deficiency. It is believed that it is misleading and in Massachu- 

 setts illegal to present a combined protein and fat guarantee. Cot- 

 tonseed meal for fertilizer purposes is purchased on an ammonia 

 or nitrogen basis. For feeding, the protein content is considered 

 of prime importance. An excess of fat is undesirable both for 

 fertilizing and feeding purposes. 



The experiment station has for some years classified and still con- 

 tinues to classify this material into three grades according to protein 

 content. High grade or choice meal should contain 41 or more per 

 cent, medium grade or prime meal 36 to 41 per cent, and low grade 

 meal less than 36 per cent of protein. 



It is stated on good authority that the 1908 crop of seed is of 

 excellent quality, and that much of the resulting meal will test 46 or 

 more per cent protein and further that many crushers are taking 

 advantage of this condition by adding sufficient linters to reduce the 

 protein content to 41 percent. While the addition of some 10 per 

 per cent of linters probably would not render the meal injurious to 

 animals, such an admixture is not recommended and consumers are 

 urged to give the preference to meal free from such an addition. 

 The linters or short cotton fibers cause the meal to have a bulky 

 appearance. 



Humphreys, Godwin & Co., Memphis, Tenn. in addition to com- 

 plying with all the requirements of the Massachusetts law also 

 attach the following statement to goods bearing their name : 



" If, through error in manufacture, the analysis of the meal in 

 this shipment does not equal the guarantee within i per cent of pro- 

 tein as shown on the reverse side of this tag, we agree to refund on 

 the basis of 50c per unit of protein . . . such claim supported 

 by proper samples to be made within 10 days after arrival of car." 



Nitrogen, Ammonia and Protein Equivalents. 



Nitrogen, ammonia and protein are relative terms as both ammonia 

 and protein are estimated from the nitrogen content of the meal. 



One per cent of nitrogen equals 1.2 per cent ammonia equals 

 6.25 per cent protein. 



One per cent ammonia equals .8;^ per cent nitrogen equals 5.2 per 

 cent protein. 



One per cent protein equals .17 per cent nitrogen equals .20 per 

 cent ammonia. 



