PRICES OF MATERIALS. 243 



ruling retail market prices during the past year in Boston and 

 New York City :— 



Price per pound. 



I. Nitrogen, in form of ammonia and nitric acid, . . 25 cents. 



in form of dried ground meat and blood, 

 finely pulverized steamed bones, finely 

 ground fish-guano, Peruvian guano, urates, 

 poudrettes, and artificial guano, . . 20 to 21 " 



in form of fine ground bones, fine ground 

 horn, and wool-dust, 18 " 



in form of coarsely ground bones, horn- 

 shavings, and woollen rags, human ex- 

 cretions and barn -yard manure, fish- 

 scraps, animal refuse-matter from glue- 

 factories and tanneries, etc., ... 15 " 



II. Phosphoric acid, soluble in water, as contained in alka- 



line phosphates and superphosphates, . 12.5 " 



in Peruvian guano and urates, ... 9 " 



in form of so-called reduced or reverted acid, 9 " 



in precipitated bone-phosphate, steamed fine 

 bones, fish-guano, according to size and 



disintegration, from 5 to 6 " 



in form of boneblack waste, wood-ash, Car- 

 ibbean guano, ground bone-ash, coarsely 

 ground bones, poudrette, barn-yard ma- 

 nure, etc., 5 " 



in form of finely ground South Carolina and 



Navassa phosphates, 3.5 " 



III. Potassium oxide, in form of muriate of potash or 



chloride of potassium, .... 6 " 



in form of sulphate of potassa in kainits, . 7.5 " 

 in form of higher grades of sulphate of 



potassa, 9 " 



Some dealers have published valuations of their own, to 

 show the superiority of the articles they offer to their custom- 

 ers. Wherever they are of a general interest, they have been 

 mentioned in connection with the description of the fertilizers 

 they refer to. Our farmers do well to render themselves 

 familiar with the market prices of our fertilizing materials, 

 and to study statements like the preceding one. As the law 

 requires of all dealers in fertilizers to attach to each package 

 of those which sell at more than $15 per ton, a specified 

 printed record of the amount and the form of phosphoric 

 acid, of potassa, and of nitrogen which they contain, an 



