OFFICIAI, INSPECTIONS 33. 85 



phates, and similar articles, for which $20 to $75 per ton are 

 paid, depend for their trade value exclusively on the substances, 

 nitrogen, phosphoric acid and potash, which are comparatively 

 costly and steady in price. The trade-value per pound of the 

 ingredients is reckoned from the current market prices of the 

 standard articles which furnish them to commerce. The con- 

 sumer, in estimating the reasonable price to pay for high-grade 

 fertilizers, should add to the trade-value of the above-named 

 ingredients a suitable margin for the expenses of manufacture, 

 etc., and for the convenience or other advantage incidental to 

 their use. 



For many years this Station has not printed an estimate of 

 the commercial value of the different brands licensed in the 

 State. If any one wishes to calculate the commercial value he 

 can do so by using the trade values adopted for 191 1 by the 

 Experiment Stations of Connecticut, Maine, Massachusetts, 

 New Hampshire, New Jersey, Rhode Island and Vermont. 

 These valuations represent, the average retail prices at which 

 these ingredients could be purchased during the three months 

 preceding March i, 191 1, in ton lots at tide water in southern 

 New England. On account of the greater distance from the 

 large markets the prices for Maine at tide water would probably 

 be somewhat higher than those quoted. 



TRADE VALUES OE FERTILIZING INGREDIENTS EGR 191I. 



Cents per pound. 



Nitrogen in nitrates 16 



in ammonia salts 16 



Organic nitrogen in dry and fine ground fish and blood. 23 



in cottonseed meal and castor pomace 21 

 . in fine bone and tankage and in mixed 



fertilizers 20 



in coarse bone and tankage 15 



Phosphoric acid, water-soluble 4^ 



citrate-soluble 4 



in fine ground bone and tankage 4 



in. cottonseed meal, castor pomace ... 4 

 in coarse bone, tankage and ashes. .. 3^/3 

 in mixed fertilizers, if insoluble in 

 ammonium citrate 2 



