28 THE CONNECTICUT AGRICULTURAL 



Native Phosphates. 



915. Fine-ground Crude Navassa Phosphate, Navassa Phos- 

 phate Go's agent, No. 12 Cliff street, New York. Sampled and 

 sent by J. M. Milbank, Greenfield Hill. 



993. Ground Phosphate Rock. Sold by A. E. Scribner & Co., 



35 Broadw^ay, N. Y. Sample obtained from Usher & Tinker, 



Plainville. 



Analyses. 



915 993 



Phosphoric acid soluble in ammonium citrate, __ 4.09 .37 



Phosphoric acid insoluble in " " ._ 25.81 34.85 



Costperton, $l7.00f $30.00* 



Both of these samples are quite 'fine and readily yjass throiigh a 

 sieve having -Jy inch meshes. 



Bone' Chae. 



Four samples of this material have been analyzed. 873 and 

 889 were sent to the Station by the purchaser. 1033 and 1042 

 were obtained from manufacturei's in New Haven by the Station. 

 They are all waste materials which have been used for case-hard- 



ening iron. 



Analyses. 



o 



873 889 1033 1043 



Water, 25.91 2.38 



Carbonic acid, .. 2.15 1.18 



Phosphoric [acid, 29.17 28..34 16.63 21.34 



This bone char is little more active as a fertilizer than fine 

 ground phosphate rock, when applied directly to land. When 

 properly treated^with oil of vitriol, however, it makes an excellent 

 superphosphate. See the following page. 



Plain (Non-Nitrogenous) Superphosphates. 



This class includes fertilizers which are made by treating some 

 phosphate (i-ock phosphate, bone ash, bone char, etc.), with a very 



* $22.00 per ton wholesale in N. Y. 



f f. 0. b. in N. Y., $18.00 to $18.50 in Southport. 



