392 Report OF THE INSPECTION WoRK OF THE 
These trade-values represent, as nearly as can be estimated, 
the average prices at which, during the six months preceding 
March, the respective ingredients, in the form of wanuaxed raw 
materials, could be bought at retail for cash in our large markets. 
These prices also correspond (except in case of available phos- 
phoric acid) to the average wholesale prices for the six months 
preceding March, plus about 20 per ct., in case of goods for which 
there are wholesale quotations. 
TRADE-VALUES OF PLANT-Foop ELEMENTS IN RAw MATERIALS AND 
CHEMICALS. 
Cts. a eons 
Nitroven:, In ammonia Salts... 5). cdi. .ssiectuses episodes eeaeeee 1714 
s Mh TEER ECS. 33 + 0c sds p's Bx aE Fas eee eee 15 
Organic nitrogen in dry and fine-ground fish, meat and 
blood and mixed fertilizers........ LT 
7 in fine-ground bone and tankage...... 1614 
4: in medium bone and tankage........ 12 
Phosphoric’ acid, water-soluble cs ee -aj1-- een oe eee 4% 
iS citrate-soluble (reverted) ........... 4- 
of in fine-ground fish, bone and tankage.. ~ 4 
= in cottonseed meal, castor-pomace and 
ARES. a. Sarena woo ana onan ohap erat eren arate ereiere 4 
* in coarse fish, bone and tankage...... 3 
= in mixed fertilizers, insoluble in am- 
monium citrate or water... 0... 2. 2 
Potash as high-grade sulphate, in forms free from muri- 
ates:( chlorides) , in ashes; ete. Sony. 3s.-. oe pean ee ee 5 
Potash in. WWUElale. <i. 2. so prae cate ee ciagete aat eee ene 4, 
COMPARISON OF SELLING PRICE AND COMMERCIAL VALUATION. 
Giving to the different constituents the values assigned in the 
schedule for mixed fertilizers, 17 cents a pound for nitrogen, 414 
cents a pound for water-soluble phosphoric acid, 4 cents a pound 
for citrate-soluble phosphoric acid, 2 cents a pound for insoluble 
phosphoric acid, and 414 cents a pound for potash, we can calcu- 
late the commercial valuation, or the price at which the separate 
unmixed materials contained in one ton of fertilizer, having the 
