76 MAINE AGRICUIvTURAIv DXP^RIMElNT STATION. I905. 



Pounds of digestible nutrients in loo pounds of the different 

 grades of cottonseed meal and their comparative money values 

 as a source of protein. 





O 3 



u o 



'l ® 3 



(J) fc4 



A— Very high grade 



B— Poor color 



C— Medium giade.. 

 D — Low grade 



80.4 

 72.2 

 63.9 

 55.0 



39.0 



20.8 



9.78 



35.0 



13.9 



8.4 



28.5 



16.3 



7.3 



17.3 



16.5 



5.6 



$1 40 

 1 26 

 1 02 

 62 



According to the analyses alone, the low grade goods would 

 be worth about half as much as the high grade, but as a matter 

 of fact they are worth less than half, for the reason that the pro- 

 tein is of poorer quality and less digestible than that of the high 

 grade goods. The coefificients for the organic matter and pro- 

 tein of the low grade goods are only 64.1 and 72.6 per cent 

 respectively, while those of high grade are 95.3 and 83.3 per cent. 

 The pounds of digestible protein in 100 pounds of the low grade 

 goods is considerably less than half that of the high grade, and 

 if the high grade meal is assumed to be worth $1.40 per 100 

 pounds on the basis of its digestible protein, 100 pounds of the 

 low grade meal are worth only 62 cents. As the difference in 

 price on the market for the different grades of goods is only 

 slight, rarely more than one or two dollars per ton, the above 

 results show how very necessary it is for a buyer of cottonseed 

 meal to know the quality of the goods he is getting. To the 

 ordinary observer meal classed as "D" would look nearly as 

 good as that called "A." The excess of hulls it contains are so 

 finely ground that they do not show unless separated by mixing 

 with water, so the color is very good and many buyers would 

 be tempted to purchase it if the price were 10 or 15 cents a hun- 

 dred lower than that of the high grade. 



Such figures as those of the tables are at least suggestive to 

 the users of cottonseed meal. They point out the importance 

 of care in the purchase and use of this class of goods and justify 

 the feeding stuffs inspection laws which have almost entirely 

 driven the lowest grades out of the State. 



