Quarterly Reports of the Chemical Committee. 257 
Like the preceding cakes, it was made from unscreened linseed, 
containing, besides sand, numerous small weed-seeds, and was 
not a pure linseed-cake. 
No further information was obtained in answer to the usual 
inquiries. 
3. A sample, bought as nitrate of soda bj a Member of the 
Royal Agricultural Society, was found on examination to con- 
tain only -003 per cent, of nitric acid. It thus contained merely 
faint traces of nitrate of soda, and on further analysis was found 
to be a mixture of chloride of sodium (common salt) and sul- 
pliate of soda (Glauber salt). 
This so-called nitrate of soda having been bought at a low 
price without a guarantee, the purchaser did not feel justified in 
furnishing the vendor's name and address. 
4. The following is an analysis of a sample of a manure, a 
cwt. of which 'had been sent for trial to Mr. George Neve, 
Sissinghurst, Staplehurst, Kent. The manure was sold at 12/. 
a ton, but without any guaranteed analvsis ; — 
Moisture 11-12 
Organic matter 12 '74 
Bone-iDhosphate of lime 37 "17 
Sulphate of lime 10 '05 
Crystallised sulphate of iron (green vitriol) .. .. 2 '78 
Basic sulphate of iron, containing 7 "28 of sul- 
lihuric acid •.. .. 25*49 
Insoluble siliceous matter "05 
100-00 
This manure, it will be seen, contained in round numbers 
37 per cent, of phosphate of lime, some sulphate of lime, and a 
considerable proportion of sulphate of iron. It contained no 
appreciable quantity of ammonia, and appeared to be mainly 
a mixture of animal charcoal and sulphate of iron. Such a 
mixture can be produced at less than half the price at which 
the sample of manure sent by Mr. Neve was sold. 
March, 1878. 
1. A sample of cake, sold as the " best Pure Linseed-cake 
than can be made," was sent to me for analysis and opinion on 
the 15th of January, 1878, by Mr. Martin Pate, Ely, Cam- 
bridgeshire, and was found to have the following composition : — 
VOL. XIV. — S. S. S 
