17 



found active by the alkaline pennanganate method. The aver- 

 age retail cash price for blood has been $50.74 per ton, and the 

 average calculated commercial valuation $48.26 per ton. The 

 average pound cost of nitrogen from blood has been 23.13 cents. 

 Two samples have been analyzed, both of 

 Castor which have been fotmd up to the guarantee. 



Pomace. The average retail cash price has been $25.50, 



and the average commercial valuation cal- 

 culated by the table of trade values has been $19.24 per ton. 

 The average cost of nitrogen in this form has been 26.51 cents per 

 pound. Castor pomace has shown on the average 4.81 percent 

 nitrogen, about 54 percent of which has been found active by the 

 alkaline permanganate method. 



Fifty-six samples of cottonseed meal have 



Cottonseed been examined. Each sample represents a 



Meal. carload, and all of the material inspected 



was bought as a nitrogen source, largely for 



tobacco. The average retail cash price has been $31.45, and the 



average calculated commercial valuation $25.95 per ton. The 



average pound cost of nitrogen in this form has been 24.24 cents. 



Cottonseed meal has averaged 6.49 percent nitrogen, about 56 



percent of which has been found active by the alkaline preman- 



ganate method. The following brands showed a commercial 



shortage of over 50 cents per ton: 



5. P. Davis, No. 892. Nitrogen found 6.24%, guaranteed 

 6.50%. 



Humphreys Godwin Co., Nos. 66, 72, 91, 93, 100, 102, 433, 434, 

 636, 751, 1034, 1113. Average nitrogen found 6.20%, guaranteed 

 6.50%. 



Olds & Whipple, Nos. 187, 217, 587. Average nitrogen found 

 6.01%, guaranteed 6.58%. 



/. E. Soper Co., Nos. 872, 1112. Average nitrogen found 

 6.21%, guaranteed 6.50%. 



Jacksonville Oil Mill Co., No. 92. Nitrogen found 6.26%, 

 guaranteed 6.50%. 



The large number of nitrogen shortages in cottonseed meal is 

 due probably to the practice of manufacturers in grinding a cer- 

 tain amount of hull and linters with the extracted meats. It 

 might be said that it is the general practice of the shippers to al- 

 low a rebate of 50 cents per unit for protein shortages. It is be- 

 lieved that all of the nitrogen shortages in cottonseed meal men- 

 tioned in this bulletin have been adjusted on this basis. 



