MECHANICAL ANALYSIS. 



I. II. III. ir. 



Fine, smaller than ^L inch. 28.95 56.50 33.35 46.00 



Fi.ie medium, smaller than ./g inch, 59.99 38.18 28.65 36.52 



Medium, smaller than j-V inch, 11.06 5.32 21.78 17.48 



Coarser than -^2 i»<^"li5 16.32 



100.00 100.00 100.00 100.00 



CHEMICAL ANALYSIS. 



5.59 5.85 4.18 4.21 



59.07 38.79 50.20 74.04 



20.0.S 19.90 19.32 29.42 



0.30 0.17 0.37 0.45 



5.46 7.86 9.36 13.17 



14.32 12.67 9.59 15.80 



3.88 5.90 4.72 2.08 



1.48 0.48 0.40 0.31 



are rendered 



Moisture at 100° C, 

 Ash, 



Total phosphoric acid. 

 Soluble " " 



Reverted " " 

 Insoluble " '" 

 Nitrogen, 

 Insoluble matter. 



Samples three and four consist of meat and bone 

 articles. 



597. 



BONE CHARCOAL. 



Sent on from Wellesley, Mass. 



rer Cent. 



Moisture at 100° C, 18.16 



Ash, 72.24 



Total phosphoric acid, 25.58 



Soluble " " .38 



Reverted " " 5.18 



Insoluble '^ " 20.02 



Insoluble matter, .69 



The material was coarse, and needs a treatment with sulphuric acid 



to secure a desirable speedy action of its phosphoric acid. Bone 



charcoal and Spent Boneblack are in a superior degree fitted for the 



manufacture of plain superphosphates. 



598. 



MONA ISLAND GUANO. 



Sent on from New York City. 



Moisture at 100° C, 

 Ash, 



Total phosphoric acid. 

 Soluble " " 



Reverted " " 



Insoluble " " 



Total calcium oxide, 

 Potassium oxide. 

 Nitrogen, 

 Insoluble matter, 



Per Cent. 



12.52 

 75.99 



21.88 



7.55 



14.33 



37.49 



Trace. 



0.76 



2.45 



