180-183. I, n. Receiveil f rota Lincoln, Mass. I, bone from cattle ; 

 II, bone from hogs. 



III. Received from So. Hadley, Falls, Mass. 



IV. Received from Springfield, Mass. 



Moisture at 100° C, 

 Total phosphoric acid, 

 Available phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, 



NATURAL AND ACID PHOSPHATES. 



184-188. I. Received from Westfield, Mass. 

 II, III. Received from Hingham, Mass. 

 IV, V. Received from Marlborough, Mass. 



Per cent. 

 I. 



Moisture at lOO'^ C, .^2 



Total phosphoric acid, 27.24 

 Available phosphoric acid, * 



Insoluble phosphoric acid, * 



Insoluble matter, 22.37 



189. Florida soft phosphate received from Boston, Mass. 



Per cent. 



Moisture at 100° C, .78 



Total phosphoric acid, 21.17 



Available phosphoric acid, 1.47 



Insoluble phosphoric acid, 19.70 



Potassium oxide, .21 



Calcium oxide, 30.21 



Ferric and aluminum oxides, 11.20 



Carbonic acid, 2.08 



Sulphuric acid, trace 



Insoluble matter, 37.79 



*Not determined. 



