1911.] PUBLIC DOCUMENT — No. 31. 65 



have no particular significance in this connection. The extrav- 

 agant claims made by the company for this " New England 

 mineral fertilizer " are overdrawn, and border somewhat upon 

 the ridiculous. 



NiTiiOGEN Compounds. — Sulfate of Ammonia, — Two sam- 

 ples of sulfate of ammonia have been analyzed and found well 

 u]) to the guarantee. The average cost of the pound of nitrogen 

 in this form has been 15.65 cents. 



Nitrate of Soda. — Sixteen samjjles of nitrate of soda have 

 been analyzed and only 1 was found deficient in nitrogen. The 

 average cost of nitrogen per pound in this form has been 1(5.50 

 cents. 



Dried Blood. — Three samples of this material were exam- 

 ined, 2 of the brands showing a considerable overrun and 1 a 

 slight deficiency in nitrogen, the latter containing, however, 

 considerable phosphoric acid. The average cost of nitrogen 

 from blood has been 20.16 cents per pound. 



Castor Pomace. — Six samples of castor pomace have been 

 inspected and the guarantee was maintained in each instance. 

 The average cost of nitrogen in this form has been 22.29 cents 

 per pound. 



Cottonseed Meal. — Nineteen samples of cottonseed meal 

 used for fertilizer have been examined. These were licensed 

 by 6 companies doing business in Massachusetts. Nitrogen 

 from cottonseed meal has cost on the average 28.47 cents per 

 ]>ound. Seven out of the 19 samples analyzed showed a com- 

 mercial shortage amounting to over 50 cents per ton. 



Potash CoMPOUNns. — Carbonate of Potash. — Only 1 

 sample of carbonate of potash was analyzed during the season. 

 Tt sold so that the pound cost of actual potash was 7.54 cents. 



ITigh-grade Sulfate of Potash. — Nine samples of high-grade 

 sulfate of potash have been examined and the potash guarantee 

 was maintained in every instance. The pound of actual potash 

 in this form has cost, on the average, 4.64 cents. 



Potash-magnesia Sulfate. — Seven samples of double sulfate 

 of potash and magnesia have been examined, and all have been 

 found well up to the guarantee. The pound cost of actual pot- 

 ash in this form has been 5.46 cents. 



Muriate of Potash. — Eleven samples of nmriate of ]iotash 



