Experiment Station Report. 



93 



Cents per lb. 



Phosphoric acid, insoluble, in fine medium bone, . . 5^ 



Phosphoric acid, insoluble, in medium bone, . . . 5 • 



Phosj^horic acid, insoluble, in coarse medium bone, . . 4J 

 Phosphoric acid, insoluble, in coarse bone, bone ash, and 



bone black, 4 



Phosphoric acid, insoluble, in fine ground rock phosphate, 2.75 



Potash, in high grade sulphate, 7 



Potash, in low grade sulphate and kainite, . . . i\ 



Potash, in muriate or potassium chloride, . . . . 4J 



V. Fertilizer Analyses. 



Dry Ground Fish. 

 (Sent from South Hadley Falls, Mass.) 

 Moisture, at 100° C, 

 Total phosphoric acid. 

 Soluble phosphoric acid, ^ 

 Reverted phosphoric acid,/ 

 Insoluble phosphoric acid, 

 Nitrogen, 



Valuation per two thousand pounds, $36.53. 



10.38 

 6.00 



2.82 



3.18 

 6.13 



Castor Pumice. 



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



Moisture, at 100 C, 



Total phosphoric acid, 



Nitrogen (18 cents per pound), .... 

 Potassium oxide, 



Valuation per two thousand pounds, $23.84. 



10.18 

 2.13 

 5 69 

 0.92 



1. Dry Fish, sent by Franklin Fanners' Club. 



2. Dry Fish, sent by Milo L. Smith, Smith's Ferry, Mass. 



3. Half-dry Dog Fish Pumice, sent on from Portsmouth, R. I. 



