Analyses of Ashes of Plants. 
GOl 
Average length of straw 
Relation of graiu, straw, and chaff : — 
Grain 
Straw 
Chaff 
Actual Quantities. 
. 1680 
. 1860 
343 
Per Centaj 
43-26 
47 
■•90h 
5-S4r 
56-74 
Total . . 3883 100-00 
Specific gravity of the grain 
Per centage of water and ash : — 
Grain 
Straw 
Chaff 
Water. 
1-2-0 
13-7 
12-0 
Ash. 
1-76 
3-85 
9-18 
36 inches.* 
(irainas 1000. 
1000- 
1107-2 
204 
1311-5 
2311- 
l-374t 
' Ash calculated 
on ilrv substance. 
2 -00 
4-40 
10-43 
Quantity of produce and mineral matter removed from an acre of 
land : — 
Produce. Mineral Matter, 
cwt. lbs. lbs. 
Grain ... 12 96-0 . . 25-3 
Straw ... 14 26-4 . . 61-4 
Chaff ... 1 92-2 . . 25-3 
Total 
28 104-6 
112-0 
Specimen No. 2. — Hopfton Wheat. 
Field 22. College Farm. 
[Soil, stone-brash (calcareous), very thin ; subsoil, rock ; geological 
formation, great oolite ; undrained, but naturally dry. After rye- 
grass and clover mown for hay. Drilled at 9 inches the latter end of 
October; the crop appeared weak; reaped; carried in August. 
Estimated yield 16 bushels per acre; straw slightly mildewed, not 
strong; grain good, 59 lbs. to the bushel.] 
Average length of the straw . . 38 inches. 
* The ordinary length of the wheat stubble on this farm is 10 inches. 
t Tiie specific gravity of a specimen of grain is its weight in relation to water 
(considered as 1000), or in relation to any other specimen. The weight per bushel 
does not give the actual weight of the wheat, since the quantity of wheat which a 
bushel measure will contain is dependent on several circumstances, sucli as the size of 
the grains, the stale of roughness or otherwise of the skin, &c., which vary with the 
weatlier of harvesting and threshing, and a variety of other causes. Thus, of two 
specimens of wheat, the one which is in reality tlie heavier may yet give less pounds to 
the bushel from some one of the causes enumerated. The S])ecific gravity of a wheat 
is its true weight, irrespective of any sources of error, and is therefore an important 
pi)int in its history — for if weight be a sure criterion of quality, the specimen of highest 
specific gravity is also that of most value. The specific gravity ajipears to depend on 
the quantity of gluten — tlie larger tlie proportion of this substance, in reference to the 
starch, &c., the heavier the wheat. 
