196 BOARD OF AGRICULTURE. 



Cost per pound, 

 in cents. 

 Nitrogen. In form of nitrates, ....... 20 



In form of ammonia salts, 26 



In Peruvian guano, fine steamed bone, dried ground meat 

 and blood, fine ground fish, urates, poudrettes, super- 

 phosphates and special manures, 23 



In fine ground bone and bat-guano, 17 



In tankage, cotton-seed, linseed and castor pomace, . . 18 

 In animal refuse, wool waste, barnyard manure, fish scraps 

 and refuse from glue factories and tanneries, ... 11 

 Phosphoric Acid soluble in water. As in alkaline phosphates 



and superphosphates, 11 



In so-called reduced or reverted acid, peruvian guano and 

 urates, .......... 8 



In precipitated bone-phosphate, steamed fine bone, fish 



guano, according to size and disintegration, from ; . 6-7 



In bone-black waste, wood ash, ground bone ash, coarse 



ground bone, poudrette, barnyard manure, etc., . . 4 



In fine ground rock phosphates, 2| 



Potassium Oxide. In muriate of potash or chloride of potas- 

 sium, i\ 



In sulphate of potassa in natural and artificial kainits, . 4J 



In higher grades of sulphate of potassa, 



I. — Salines. 



Muriate of Potash. 



I. CollectcdofG. P. Smith, Sunderland, Mass. 



II. Quinnipiac l-'ertillzer Co., New London, Ct. ; collected of E. T. Sabin, East 



Amherst, Mass. 



Moisture at 100° C, 

 Potassium oxide, 

 Sodium oxide, . 

 Magnesium oxide. 

 Sulphuric acid. 

 Calcium oxide, . 

 Insoluble matter. 

 Valuation per ton, 



Nitrate of Soda. 

 (Collected of D. A. Horton, Northampton, Mass.) 



Per cent. 



Moisture at 100° C, 1.25 



Nitrogen, 15.57 



Insoluble matter, . . .45 



Valuation per two thousand pounds, .... $62.28 



