Quarterly Reports of the Chemical Committee, 1881. 375 
Moisture 3 • 45 
Sulphur 1-90 
*Orgauic matter and water of combinatiou .. 9 "20 
Oxides of iron and alumina 7 "40 
Phosphate of lime 0"44 
Sulphate of magnesia 8 • 29 
Sulphate of lime 23 "01 
Sulphate of soda 13-26 
Sulphide of soda and commou salt .. .. 23^01 
Insoluble silicious matter 10 '04 
100-00 
Containing nitrogen 0-44 
Equal to ammonia 0-53 
This manure appears to consist mainly of lime-refuse and 
alkali-Waste or salt-cake, and as it contains only about \ per 
cent, of phosphate of lime and the same amount of ammonia, it 
has little value as a manure. 
4. Mr. Charles Whitehead, Barming House, Maidstone, also 
sent a sample of Davis's Patent Manure, of which he bought 
1 cwt. at 75., price 6/. per ton, from Messrs. H. Wright and 
Son. 
The following is the composition of the sample sent by Mr. 
Whitehead : — 
Moisture 4-20 
Sulphur 4-80 
*Organic matter and water of combination .. G'Ol 
Oxide of iron and alumina 4*82 
Phosphate oflime 2-38 
Chloride of sodium 8-75 
Sulphate of soda 6-43 
Sulphate of magnesia 8-35 
Sulphate of lime 24-48 
Sulphite and a little carbonate of lime .. .. 24-83 
Insoluble siliceous matter 4*95 
100-00 
* Containing nitrogen 0-59 
Equal to ammonia 0 • 7-2 
Like the sample sent by Mr. Robert Lake, that sent by Mr. 
Whitehead consists principally of lime-refuse and alkali-waste 
or salt-cake, and is worth very little as manure. 
The two samples differ somewhat in composition ; thus, the 
sample sent by Mr. Robert Lake contained only 1-90 per cent, 
of free sulphur, and under J per cent, of phosphate of lime, and 
about ^ per cent, of ammonia ; whereas Mr. Whitehead's sample 
contained 4-80 per cent, of free sulphur, 2-38 per cent, of phos- 
phate of lime, and about J per cent, of ammonia. Uniformity 
