16 



Imperial Cotto Milling Co., Nos. 787, 968, 1011, 1123. Average 

 nitrogen found 6.14%, guaranteed 6.50%. 



S. P. Davis, No. 1130. Nitrogen found 6.07%o, guaranteed 6.50%o- 

 Olds & Whipple, Nos. 7, 26, 27. Average nitrogen found 5.97%, 

 guaranteed 6.50%. 



In the case of nitrogen shortages in cottonseed meal it has been 

 the usual custom for the broker to allow a rebate, at the rate of 50 

 cents per unit for protein. All of the nitrogen shortages noted have 

 been adjusted by a satisfactory rebate. 



Occasion is taken here to rectify an error Which occurred in the 

 1912 bulletin in connection with the J. E. Soper Co.'s Prime Cotton- 

 seed Meal, No. 1112. A guarantee oi 6.-50% nitrogen was placed on 

 this sample, when the guarantee should have been 6%. The sample 

 analyzed 6.11% nitrogen and was therefore well above the guarantee. 



Thirty-four samples have been examined, rep- 

 Nitrate of Soda, resenting seventeen analyses. Six samples were 



found deficient in nitrogen. Nitrate of soda has cost 

 on the average $56.78, and the average calculated commercial valuation 

 has been $55.57 per ton. The pound of nitrogen from this source has 

 cost on the average of 18.9 cents. Three samples of nitrate of soda have 

 shown a commercial shortage of over 50 cents per ton. 



Bowker Fertilizer Co., Nos. 326-329-337. Nitrogen found 14.68%, 

 guaranteed 15%. 



International Agricultural Corporation, Buffalo Fertilizer Co. 

 Branch. Nos. 156-629. Nitrogen found 14.72%, guaranteed 15%. 



Nitrate Agencies Co., Nos. 21.3-390-435-719. Nitrogen found 

 14.72%, guaranteed 15%. 



Four analyses have been made, and all but one were 

 Sulfate of above the minimum guarantee. The average retail 



Ammonia. cash price has been $73.33, and the calculated com- 



mercial valuation $76.43 per ton. Sulfate of ammonia 

 has tested on the average 20.65 per cent of nitrogen. The av- 

 erage cost of a pound of nitrogen in this form has been 17.01 cents. 



Two analyses were made, and the nitrogen 

 Calcium Cyanamide. guarantee was well maintained. The average 



retail cash price has been $48.96, and the cal- 

 culated commercial valuation $54.91 perton. Calcium cyanamide 

 tested on the average 14.45 per cent nitrogen, and the average cost of 

 the pound of nitrogen from this source has been about 17 cents. 

 Calcium cyanamide carries from 50 to 55 per cent of lime, at least 

 a portion of which should have the desired effect upon soil. 



