376 Quarterly Reports of the Chemical Committee, 1881. 
of composition can hardly be expected in a material which, 
like Davis's Patent Manure, consists largely of manufacturing 
refuse matters. 
December, 1881. 
The Committee beg to report the following cases which have 
been brought under their notice by the Consulting Chemist : — 
1. Mr. Richard Bettinson, Thurlby, near Bourn, Lincolnshire, 
sent a sample of a lot of two tons of bone-dust, supplied on the 
28th of June, by a Manure Company, at 9/. a ton, and invoiced 
as bone-dust. 
The following is the composition of the sample sent by Mr. 
Bettinson : — 
Moisture 12-50 
*Organic matter 14 '81 
Phosijhate of lime 55 '69 
Sulphate of lime, magnesia, and alkaline salts 15 '09 
Insoluble siliceous matter 1'91 
100-00 
* Containing nitrogen 1-23 
Equal to ammonia 1 • 49 
Good bone-dust made from raw or green bones contains from 
46 to 48 per cent, of phosphate of lime, and yields about 
4J per cent, of ammonia. It is worth from 11, 15s. to 8/. a ton. 
The sample analysed for Mr. Bettinson yielded about 8^ per 
cent, more phosphate of lime than ordinary bone-dust, but only 
1^ per cent, of ammonia. 
Bone-dust is a recognised trade name for ground " raw " 
bones. 
It appears from the preceding analysis, that the sample sent 
by Mr. Bettinson was not raw bone-dust, but boiled or glue- 
maker's refuse bone-dust, which is worth about 1/, loss per ton 
than raw bone-dust. Boiled or steamed bones of the quality of 
the sample sent by Mr. Bettinson are worth about 6/. 5s. at the 
works where they are produced. This case is published to 
show the necessity of purchasers insisting upon a full and accu- 
rate description of their purchases in the statements sent to 
them by the vendors. 
2. A manure, described as Special Turnip-manure, and sold at 
3/. 15s. per ton, and 15s. carriage, or 4Z. 10s. delivered, was 
purchased by Mr. Thomas Thursfield, Barrow, Broseley, without 
guarantee. 
A sample of this manure, on analysis, had the following com- 
position : — 
