RECTIFIED PERUVIAN GUANO. 



261 



II.— (Messrs. Breck & Co. of Boston, May 1, 1876.) 



Volatile and organic matter, 51.24 per cent. 



Ash-constituents, . . 48.76 " 



Total phosphoric acid, 18.87 



Soluble " " 5.00 



Reverted " " 6.11 



Insoluble " " 7.76 



Nitrogen (= 9.74 ammonia), 8.02 " 



Potassium oxide, 3.06 " 



Sand, etc., 6.00 



Moisture, 18.73 



III.— (Messrs. Arms & Co. of Greenfield, Mass., May 25, 1876.) 



Volatile and organic matter, 46.60 per cent. 



Ash-constituents, 53.40 



Total phosphoric acid, 14.00 



Nitrogen (=: 9.6 ammonia), 7.85 



Potassium oxide, 4.08 



Sand, etc., 10.52 



Moisture (at 100° C.) 12.28 



IV. — Rectified Peruvian Guano. 

 (Messrs. Bowker & Co., Boston, April, 1876.) 

 Volatile and organic matter, 

 Ash-constituents, 

 Total phosphoric acid, 

 Soluble " 

 Reverted " " 



Insoluble " " 



Nitrogen (:= 10.7 ammonia), 

 Potassium oxide, 



In my third official report (1875), I called the attention to 

 the announcement of the agents for the consignees of the 

 Peruvian government, Messrs. Hobson, Hurtado & Co. of 

 New York City, that they proposed to distinguish, hereafter, 

 between — 



A. — Raw genuine Peruvian Guano; and 

 B. — Rectified genuine Peruvian Guano. 



Samples Nos. I., II., and III. above properly belong to the 

 first class of genuine guanos, and No. IV. to the second class. 

 The rectified Peruvian guano is guaranteed to contain 10 per 

 cent, of phosphoric acid soluble in water, 10 per cent, actual 

 and potential ammonia, and 2 per cent, of potassium oxide. 

 The sample tested (No. IV.) exceeds the guaranteed value. 



