Analyses of Ashes of Plants. 
653 
the quantities represent very nearly the total straw ; indeed in six 
cases the entire plant, including tlie root, was sent to us, and the 
estimation of straw effected after removing the latter at a distance 
of an inch and a half from the extremity. 
Table IV. — Proportion of Straw and Chaff in 15 Specimens of 
Wheat frotn Sir John Johnstone. 
Grain as 1000. 
No. of 
Length 
Weight 
Weight 
Weight of 
Sptfci- 
Variety. 
Soil. 
of 
of 
Straw and 
men. 
Straw. 
Straw. 
Chaff. 
Chaff. 
Inches 
13 
Creeping Wheat . 
Clav and grit 
39 
937'7 
188-0 
1145*7 
14 
Talarera . . . 
Ditto 
44 
1175'0 
164-9 
1339-9 
13 
White Wheat . 
Ditto 
40 
ns4-o 
161-4 
1345-4 
IG 
Talavera . 
Calcareous loam . 
38 
1155-0 
174-9 
1329-9 
. 17 
Crcepiiii; Wheat . 
Ditto 
39 
I071-0 
116-3 
1187-3 
18 
Ditto 
" Hazle loam" . 
42 
1143-0 
198-8 
1341 -8 
19 
Ditto 
Heavy tou!;h clay 
Tou-th clay 
42 
1032-0 
165-8 
1197-8 
20 
Talavera . . 
43 
1068-0 
176-1 
1244-1 
21 
Hammond's Wheat . 
Free clay loam , 
40 
932-4 
1912 
1123-6 
23 
Red Wheat . . 
Weak clay loam . 
38 
919-3 
242-9 
1162-2 
24 
White Wheat . 
Weak sandy clay 
41 
1009-0 
178-2 
U87-2 
25 . 
.Creeping Wheat 
Red clay . 
40 
981-0 
179 5 
1160-9 
26 
Ditto 
Clay and sand , 
Ditto 
44 
1272-0 
179-0 
1451-0 
27 
Ditto 
45 
1279-0 
185-6 
14C4-6 
28 
Ditto 
Calcareous rubble 
45 
1192-0 
181-1 
1373-1 
Of the 15 specimens here given, only in one instance does the 
united weights of straw and chaff reach 1400; and the greater 
number of specimens fall far short of this amount. 
The mean of tlie whole is — • 
For the straw . . . 1091 '4 
„ chaflF . . . 178-9 
Straw and cliaff . 1270 "3 
Mean length of straw, 41 '3 inches. 
Let us compare the mean of all these specimens from different 
localities. 
Table V. — 3Iean Proportion of Straw and Chaff to Grain. 
1 1 Specimem from College Farm . . 
12 Specimens from Mr. Morton . . . 
15 Specimens from Sir J. Johnstone . . 
Length 
ofStraw. 
Straw. 
Chaff. 
Straw and 
Chaff. 
Inches. 
36-0 
43-3 
41-3 
991-3 
1099-5 
1091-4 
205-6 
181-6 
178-9 
119G-9 
1281-1 
1270-3 
2x2 
