On the Food of rimils. 529 
4. Barley grown in Rattersea Fields. 
Straw : — 
300 grains of entire straws gave of ash , 20*6 grains. 
300 .... . 19-7 „ 
300 21-3 „ 
300 22-0 „ 
The mean giving 6 • 97 per cent. 
20 grains gave, on analysis : — 
III 100 parts. 
Soluble portion — 
Sulphate of potash . . 3-32 . 16' 6 
Chloride and little silica . 0-08 . 0*4 
Insol. portion — 
Siliceous scales . . 14*1 . 70*5 
Phosphates of lime and magnesia 1"7 . 8*5 
Carbonate of lime . . 0*4 . 2*0 
Alkali, magnesia, and loss . 0*3 . 1*5 
Water . . . . O'l . 0-5 
20-0 100*0 
14" 1 grains of siliceous scales gave, on analysis : — 
Silica ...... 12-3 
Phosphates . . . . . 0"5 
Carbonates of lime and magnesia, alkali, and loss 1*3 
14-1 
Grain of preceding straw : — 
1000 grains gave of ash, by incineration . 24 grains. 
Or, 2'4 per cent. 
1 0 grains gave, on analysis : — 
In 100 parts. 
Phosphate of potash . . . 4 " 3 . 43 
Phosphates of lime and magnesia . 2*9 . 29 
Siliceous matter, &c. . . . 2'8 . 28 
10*0 100 
Soluble phosphate converted into chloride, and examined for 
soda : — 
3 grains of ignited salt gave of double chloride 9*3 grains = 2*84 
grains of pure chloride of potassium. 
5. Rye grown in Battersea Fields. 
Straw : — 
400 grains of straw gave of ash , . 18* 7 grains. 
400 . . . . . 21-7 „ 
400 21-2 „ 
Or, 4*106 per cent. 
2 M 2 
