MODE UN HIGH FARMING. 



Moisture 4.89 



Wall r of combination 2.01 



* Phosphoric Acid 25.60 



Lime 37.19 



Magnesia 0.75 



Oxide of Iron and Alumina 9.1G 



Carbonic Acid 4.09 



Sulphuric Acid 1.77 



Chloride of Sodium 2.03 



Fluorine and loss 2.22 



Insoluble and Sandy Matter 10.29 



3.10 



1.55 



2333 



100.00 



0.80 

 8.70 

 5.00 

 2.00 

 1.97 

 2.14 

 15.39 



100.00 



7.89 



1.57 



22.10 



37.18 



traces. 



10.02 



3.07 



i a> 

 '^ o 5.15 



100.00 



48.H 



*Equal to Tribasic Phosphates of Lime 55.80 E0.85 



The river phosphates are generally of a somewhat higher percent- 

 age than the above, and now furnish the bulk of our supply. They 

 usually contain minute quantities of iron pyrites, are of a dark gray, 

 nearly approaching to black color, and are extremely hard and 

 difficult to reduce to an impalpable powder. 



When dried and ready for shipment the general average result 

 of their analysis is the following : 



1. 2. 3. 



Moisture O.G2 



Water of combination and loss oa ignition . . . 3.09 



*Phosphoric Acid 29.03 



Lime 45.27 



Magnesia Traces. 



Oxide of Iron and Alumina 9.10 



Carbonic Acid 3.34 



Sulphuric Acid, 



By difference 3.42 



G.13 



Chloride of Sodium 

 Fluorine, 



Insoluble Sandy Matters 100.00 



*Equal to Tribusic Phosphate of Lime 63.28 



59.50 



55.20 



They are mined from the rivers under concessions from the gov- 

 ernment, in consideration of certain royalties paid into the State 

 coffers, for every ton extracted and taken away. 



The deposits arc very extensively worked throughout the entire 

 year, but most energy is displayed during the summer months, when 

 they afford employment to thousands of work-people. 



