( 269 ) 
X. — Qnarterli/ Report of the Chemical Committee, Decembe?; 
1872. 
Dr. Voelcker reports a case of rape-cake whicli was purchased 
for manuring purposes bj Mr. James Blytli, Weasenham, 
Brandon, Norfolk. 
The sample was sent in a broken state, and on inspection 
appeared to consist of pieces of rape-cake and fragments of other 
descriptions of cake. 
Mr. Bljth wrote to Dr. Voelcker : — " In reply to your inquiry, 
the rape-cake was purchased for manure, but, as from the sample 
you have, it was sent in that mixed state, although sold as all 
rape-cake. From an inspection of it in a lump, it appears a 
general mixture of all kinds of things. 
" Will you kindly analyse it as mixed, and state its worth as 
manure, the price being 6/. 15s. per ton. 
" Yours faithfully, 
" James Blyth." 
The following results were obtained in the analysis of this 
•broken cake : — 
Composition of Manuring Ttape-cal^e sent hy Mr, James Blytli, 
Weasenham, Brandon, Norfolk. 
Moisture 8-24 
♦Organic matter 82-40 
Phosphates 2-56 
t Alkaline salts 4-08 
Insoluble matter 2-72 
100-00 
* Containing nitrogen 3*18 
Equal to ammonia 3-86 
t Containing phosphoric acid 24 
Equal to tribasic phosphate of lime . . . . 1 ' .'i8 
On further examination, the sample sent by Mr. Blyth was 
found to be rape-cake mixed with pieces of Bassia-cake. Good 
manuring rape-cake, the market value of which at the time was 
6/. 15s. per ton, contains about 5 per cent, of nitrogen, nearly 
2 per cent, more than this mixed cake, and is worth from 2os. to 
30s. more per ton than the cake sent for analysis. 
With regard to feeding cakes. Dr. Voelcker reports the follow- 
ing cases : — The Rev. Thos. Best, of Red Rice House, Andover, 
sent a sample of linseed-cake, which was found to be adulterated 
with earth-nut-cake and buck- wheat. Another sample of the 
cake was subsequently sent by Mr. Best, who stated that the cake 
cost him 12/. per ton ready money, and that he bought it as the 
best English linseed-cake. 
T 2 
