On the Chemistrii of Silesian Sugar-Beets. 367 
The two roots yielded on analysis tlie following results : — 
Table VIII. — Composition of Silesian Sugar-heels manured with London 
Sewage, Lodge Farm, Barking Creek, 
Kind of root 
Weight of root 
Specific gravity of juice 
At a temperature of 
Moisture 
•Albuminous compounds 
Crude fibre (pul]j) 
Crystallizable sugar 
Pectin, colouring matter, &c. 
Mineral matter (ash) . . 
Ecd. 
White. 
2 to 2? ozs. 
4 to 1 oz. 
1-0716 
1-0458 
64° F. 
58° F. 
80-79 
87-94 
■88 
1-26 
3-32 
3-08 
13-19 
6-05 
-91 
-48 
-91 
1-19 
100-00 
100-00 
*Containing nitrogen '124 '202 
It is a remarkable fact that of all the specimens analysed last 
season, that grown on the London sewage at Barking proved the 
highest in sugar-producing quality. Fearing a mistake might 
have been made I repeated the analysis with closely agreeing 
results. There can, therefore, be no reasonable doubt that the 
red-skinned Silesian beet grown on London sewage really con- 
tained 13 per cent, of sugar. 
It is further well deserving special notice that, notwith- 
standing the large amount of sugar, and the fact that the beet 
was grown on sewage, it contained but a very small amount of 
albuminous or nitrogenous compounds, and less saline mineral 
matter than almost any other specimen analysed by me in 1868. 
This is of great importance to the manufacturer of sugar, who 
knows full well that the albuminous compounds and the saline 
matters in beet- root juice destroy, in the process of manufacture, 
the crystallizing property of a certain amount of sugar. Of two 
roots containing an equal percentage of crystallizable sugar, but 
variable proportions of albuminous and saline matters, the one 
containing the smaller amount of soluble compounds, other than 
sugar, will therefore produce the larger proportion of soluble 
crystallized sugar. 
The larger white Silesian beet from the same farm, it will be 
noticed, contained 88 per cent, of water, or about as much as 
ordinary mangolds grown for feeding purposes in this country, 
and yielded not quite half the amount of sugar which I found in 
the red-skinned beet. 
As stated already the large white root was rotten in the 
centre, of a porous texture, and had more transparent flesh than 
the red and much smaller specimen. 
