BAT-GUANO DEPOSITS. 327 



as well as the proper treatment of wool-waste was discussed 

 in my fourtli report, to be found in Flint's Report for 1876, 

 p. 254, to which I refer parties interested. 



Bat-Guano.' 



(Sent on for examination, from Galveston, Tex.) 



Per cent. 



Organic and volatile matter 77.33 



Ash constituents 22.67 



Moisture lost at 100° C • . 21.15 



Total nitrogen 7.14 



Phosphoric acid 6.53 



Insoluble matter, sand, &c 95 



Valuation per ton of two thousand pounds : — 



142.8 pounds of nitrogen at 18 cts. per pound . . $25 70 

 130.6 pounds of phosphoric acid, 5 cts. per pound . 6 53 



$32 23 



The bat-guano deposits of Texas, referred to in my report 

 of 1876-77, as well as the one from which the above sample 

 was obtained, consist evidently of a valuable material, and 

 deserve particular attention. Judging from communications 

 lately received from the owners of some of these deposits, 

 their importance for the development of Southern special 

 agricultural interests, as cotton, sugar-cane, and rice culti- 

 vation, begins to be appreciated. The prospects are, that 

 hereafter but small quantities will find their way into oui 

 Northern markets. 



Castor-Bean Pomace. 



(8ent by Hon. Charles L. Flint, Boston, Mass. ; obtained from works in 



St. Louis, ^o.) 



Per cent. 



Moisture lost at 100° C 9.25 



Nitrogen ......... 5.38 



Phosphoric acid 2.03 



Potassium oxide 64 



Calcium oxide 96 



Magnesium oxide 37 



Sand, &c 2.38 



Valuation per ton of two thousand pounds : — 



106.6 pounds of nitrogen at 18 cts. per pound . . $19 19 

 40.6 pounds of phosphoric acid .• . . . 2 44 

 12.8 pounds of potassium oxide . . . . 1 77 



$22 40 



