On the Food of Plants. 
\). Potatoes from a garden in Battersea Fields ; tops. 
20 grains contained — 
Carbonate of potash 
Sulphate of potash 
Chloride of potassium 
Silica 
Carbonate of lime . 
Earthy phosphates 
Sandy matter 
Water 
Loss 
533 
>h . 
23 "5 grains. 
Ill 100 parts. 
41 U.T 
1 • 1 /) 
1 14 
1; ■ 1 
a 1 
0-05 
0-25 
0-3 
1-5 
K. • 0 
on • X 
2-0 
lo-o 
2-0 
10-0 
0-3 
1-5 
0-1 
0-5 
20-0 
100-0 
Tubers — cut into thin slices and dried. 
500 grains of dried slices gave of ash 
800 
Mean = 4*4 per cent 
20 grains of ash contained — 
Carbonate of potash, with a little chloride 
Phosphate of potash 
Sulphate of potash .... 
Silica ...... 
Earthy phosphates, with traces of carbonate! 
of lime, magnesia, and oxide of iron . J 
Water ..... 
19 
5 
grains. 
39 
3 
111 100 
parts. 
10 
12 
53 
•6 
3 
58 
17 
•9 
2 
7 
13 
•5 
0 
1 
0 
•5 
. 2 
1 
10 
■ 5 
0- 
8 
4 
•0 
20- 
0 
100 
•0 
1 0. Turnips grown in same garden ; tops. 
250 grains of dried tops gave of ash 
Or 18*8 per cent. 
20 grains gave^ on analysis- 
Sulphate of potash .... 
Carbonate of potash, with a little chloride 
Carbonate of lime . 
Earthy phosphates, &c. 
Carbonate of magnesia 
Sandy matter and loss 
Water 
47 grains. 
Ill 100 parts. 
5-61 
28 
•05 
3-29 
16 
•45 
7-55 
37 
•75 
2-2 
11 
0 
0-32 
1 
6 
0-93 
4 
65 
0-1 
0 
5 
20-0 
100 
0 
Bulbous portion, cut into thin slices and dried: — 
200 grains of dry slices, gave of ash . 20 "4 grains. 
Or 10*2 per cent. 
