17 



pound. The nitrogen, 5.25 per cent of which was found present, 

 showed an activity of about 59 per cent. 



Sixty-three samples of cottonseed meal have been 

 Cottonseed Meal, examined. Most of these samples were collected 

 by our inspectors during the winter months and 

 upon call from purchaser. Each of the samples represents a carload 

 and all the material was bought as a nitrogen source for tobacco. 

 The average retail cash price for cottonseed meal has been $33.14 and 

 the average calculated commercial valuation, based on the nitrogen 

 content alone, has been $30.61 per ton. The average pound cost of 

 nitrogen has been 24.37 cents. The average per cent of nitrogen in 

 cottonseed meal has been 6,80 . The nitrogen in cottonseed meal 

 shows an activity of about 56 per cent by laboratory methods. This 

 is considerably less than the actual availability as shown by vegeta- 

 tion experiments, probably due to the large amounts of cellular mater- 

 ial present. Seventeen samples showed a nitrogen deficiency. The 

 following brands have shown a commercial shortage of over fifty cents 

 per ton. In these cases the phosphoric acid and potash have not been 

 figured in offsetting the nitrogen deficiency as the products were 

 bought primarily as a nitrogen source and no account was made of the 

 potash and phosphoric acid in the product in the statement of guaran- 

 tee furnished by the manufacturer or shipper. 



Buckeye Cotton Oil Co., No. 3 Nitrogen found 6.33%, guaran- 

 teed 6.56%. No. 30, nitrogen found 5.87, guaranteed 6.18%. 



A. W. Higgins, Westfield, Mass., No. 1134. Nitrogen found 

 6.65%, guaranteed 7.00%. 



Humphreys-Godwin Co., No. 37. Nitrogen found 6.01%, guar- 

 anteed 6.12%. No. 39, nitrogen found 5.96%, guaranteed 6.18%. 

 No. 170, nitrogen found 7.30%, guaranteed 7.50%. No. 931, nitro- 

 gen found 7.15%, guaranteed 7.50%. 



Union Seed & Fertilizer Co., No. 4. Nitrogen found 5.98%, 

 guaranteed 6.17%. No. 19, nitrogen found 5.87%, guaranteed 6,17%. 

 No. 1057, nitrogen found 6.01%, guaranteed 6.17%. No. 1058, 

 nitrogen found 5.94%, guaranteed 6.17%, 



In this connection it might be added that the nitrogen deficien- 

 cies here enumerated were all made good by a rebate to the farmer, 

 many of the products being sold with the understanding that if the 

 nitrogen was found deficient a rebate would be in order. As will be 

 seen from the table of analyses many brands put out by these various 

 companies showed their nitrogen guarantee to be well maintained. 



Thirty-four samples, represented by 17 analyses, 

 Nitrate of Soda. have been examined. 



Two samples were found deficient in nitrogen. 

 Nitrate of soda has cost on the average of $53.88 and the average cal- 



