182 



Phosphate of Lime, 25.0 



Phosphate of Ammonia, 13.0 



Silicious Sand, 1.0 



100 



Analysis of African Guano. (Dr. Antisell.) 



Oxalate and carbonate of Ammonia, 6 5.0 



Uric acid and organic matter, 12.4 



Phosphates of Lime and Magnesia, 20.0 



Sand, 1.5 



Phosphate and muriate of Soda, 4.2 



Water, 6.9 



100.0 



The following are analyses, by Professor Way, of two specimens Pe- 

 ruvian guano : 



Water, 12.37 13.67 



Organic matter and salts of Ammonia, 33.67 52.97 



Sand and Silica, 1.72 1.42 



Phosphoric Acid, 20.21 14..50 



Sulphuric Acid, 4.00 2.51 



Lime, 16.49 10.48 



Magnesia, 0.80 0.34 



Oxide of Iron, 0.22 0.73 



Potash, 3.60 1.42 



Soda, .- 4.15 none. 



Chloride of Potassium, none 2.02 



Chloride of Sodium, 2.57 



100.00 100.00 



Guano is frequently adulterated with ashes, clay, or sand of a brown 

 color. Farmers should be extremely cautious in purchasing this ma- 

 nure, except from a first rate house, or direct from the ship, otherwise 

 they may not be able to procure a genuine article. Fraud in Guano 

 may be detected by the following process: 1st, weigh a sample and 

 lay it on a piece of papei-, on a warm stove, (the heat should not be 

 sufficient to scorch the paper,) until it appears quite dry, then weigh it. 



