602 
Analyses of Ashes of Plants. 
Eelation of grain, straw, and chaff: — 
Actual Quantities. 
Grain . . . 1855 
Straw . . . 18-28 
ChatY ... 381 
Total . . 3067 
Specific gravity of tl 
Per centage of water and ash : 
Mater. 
Grain . . . 12-0 
Straw . . . 12-3 
Chaff . . . 12-0 
Quantity of produce and mineral matter removed from an acre : — 
Produce. Mineral >[atter. 
c«t. Ihs. lbs. 
Grain ... 8 48-0 . . 16-0 
Straw ... 8 34-5 . . 35-0 
Chair ... 1 72-6 . . 18-1 
Total . . 18 la-l G9«l 
Analysis of the ash of the grain : — 
Removed 
from an Acre. 
1I)S. 07.S. 
Silica 2-84 . . 0 7A 
Phosphoric Acid 47-00 . . 7 ^ 
Sulphuric Acid 0-21 . . 0 Ij 
Carbonic .Vciil 0-2;3 . . 
Lime 3-20 . . 0 8J 
Magnesia 12-71 . . 2 OA 
Peroxide of Iron 0-CO . . 0 1^ 
Potash 33-15 . . 5 4| 
Soda 0-00 . . 
Chloride of Sodium .... 0-00 . . 
Total 99-97* . , 15 15^ 
Specimkn No. 3. — April Wiikat. 
Field 3. College Farm. 
[Soil, stone-brash (calcareous); subsoil, rock mi.xed with clay; geo- 
lof/iral formation, forest marble ; undrained, not requiring draining. 
After thin crop of swedes fed off on the land. Drilled at 9 inches 
in the middle of April, 1846; appearance of the crop light, being 
* Thi.s and the numbers in all the following analyses are not given as the actual 
result, but refer to tiie calculated composition of the asli — charcoal, &c. and loss bein^ 
deducted. The carbonic acid is not considered as a mineral ingreilient of tlie plant, 
being formed (it is supposed) in all cases in llie burning. The quantity is too small 
here to render a correction necessary for it, but it is not includcil in the calculation of 
the matter removed by the grain from an acre of land. 
Per Centage. Grain as 1000. 
45-6 . . 10000 
100-0 2192-9 
lie grain . . 1 • 342 
Ash. 
Asli calculated 
on dry substance. 
1-81 . . 2-05 
3-77 . . 4-30 
9-31 . . 10-58 
