COMMERCIAL FERTILIZERS. 487 



Trade Values of Fertilizing Ingredients in Raw Materials and 



Chemicals. 



1887. 

 CtB. per ponnd. 



Nitrogen in nitrates, 16 



Nitrogen in ammoniates, 17^ 



Organic nitrogen in dried and fine ground fish, .... 17^ 

 Organic nitrogen in Peruvian guano, blood, meat, azotin ammo- 

 nite and castor pomace, 17^ 



Organic niti'ogen in fine ground bone and tankage, ... 16 

 Organic niti'ogen in fine medium bone and tankage, . . .14 



Organic nitrogen in medium bone and tankage, .... 12 



Organic nitrogen in coarse medium bone and tankage, ... 10 

 Organic nitrogen in coarse bone, horn shavings, hair and fish 



scraps, 8 



Phosphoric acid, soluble in water, 8 



Phosphoric acid, soluble in ammonium citrate,* .... 7^ 

 Phosphoric acid, insoluble in dry fine ground fish, in fine bone, 



tankage, 7 



Phosphoric acid, insoluble in fine medium bone and tankage, . 6 



Phosphoric acid, insoluble in medium bone, 6 



Phosphoric acid, insoluble in coarse medium bone, ... 4 



Phosphoric acid, insoluble in coarse bone, 3 



Phosphoric acid, insoluble in fine ground rock phosphate, . * . 2 



Potash as sulphate in compounds free from chlorine, . . . 5| 



Potash as kainite, A\ 



Potash as muriate, 4^ 



The above trade values are the figures at which, on INIarch 

 1st, the respective ingi*edients could be bought at retail for 

 cash per pound in our leading markets in the raw materials, 

 which are the regular source of s'upply. 



They also correspond to the average wholesale prices for 

 the six months ending March 1st, plus 20 per cent, in case 

 of goods for which we have wholesale quotations. 



The calculated values obtained by the use of the above 

 figures will be found to agree fairly with the reasonable 

 retail price in case of standard raw material such as, — 



Sulphate of Ammonia, 

 Nitrate of Soda, 

 Muriate of Potash, 

 Sulphate of Potash, 

 Dried Blood, 

 Dried Ground Meat, 



Dry Ground Fish, 



Azotin, 



Ammonite, 



Castor Pomace, 



Bone, 



Plain Superphosphates. 



♦Dissolved from two grams of Phosphate, nnground, by 100 C. C. Eeutr.il solu- 

 tion of ammonium citrate, sp. gr. 1.09, in 30 minutes at 65 deg. C, with agitation 



