585 
©fficial IRepoi’t. 
QUARTERLY REPORT OF THE CHEMICAL 
COMMITTEE, 
July, 1892. 
1. Mr. D. Craig, of Graveleys, Great Waltham, Chelmsford, 
brought for analysis on May 7 a sample of what he said had been 
purchased as Bone Superphosphate at &l. per ton, and which was 
guaranteed (though not in writing) to contain 35 per cent, of 
phosphates. 
Upon analysis the following results were shown : — 
Moisture 
* Organic matter and water of combination 
Monobasic phosphate of lime 
equal to tribasic phosphate of lime (bone phosphate) 
rendered soluble by acid . . . . . 
Insoluble phosphates 
Sulphate of lime, alkaline salts, &c. 
Insoluble siliceous matter 
May 17, 1892. 
18-88 \ 
4-36 
12-79 
(20-04) V 100-00 
4-34 
65-35 
4-29 
This is not bone superphosphate at all, but is an ordinary mineral 
superphosphate of lower quality than usual, and such as would be dear at 
37. per ton at the present time. 
In answer to inquiries Mr. Craig wrote : — 
J. A. Voelcker, Esq. July 4, 1892. 
Dear Sir, — In reply to your letter, I have settled the affair with , . . 
I had the manure of, by paying him superphosphate price, as he said he 
made a mistake, and sent the mineral super instead of bone super. 
Yours faithfully, 
Donald Crais. 
P.S. — I paid 37. 6s. per ton for the manure. 
2. Mr. J. Hepple, of Capheaton Hall, Newcastle-upon-Tyne, sent 
on May 19, on behalf of Sir John Swinburne, Bart., a sample of 
4 tons of Bone Meal which had be*^n pvt chased at 67. per ton carriage 
paid. 
3 s 2 
