652 
Analyses of Ashes of Plants. 
The mean of these results will be found to be — 
For the straw . . . 1083' 
„ chaff . . . 163-6 
For the straw and chaff 1246 '6 
Mean length of the straw, 42 • 4 inches. 
In these specimens the mean length of the straw and its weight 
in proportion to the grain are both greater than in those of the 
other series from the College farm : this is evidently due in a great 
measure to the method of collecting the crops, Mr. Morton's all 
being mown, and the others, with two exceptions, reaped. 
Table III.' — Proportion of Grain, Straw, and Chaff in 7 Specimens 
of Red- Straw White Wheat from Mr. Morton. 
Grain as 1000. 
No. of 
Length 
Weight 
Weight 
of 
Weight of 
Speci- 
Variety. 
Soil. 
of 
of 
Straw and 
men. 
Straw. 
Straw. 
Chaff. 
Chaff. 
Indies 
43 
Ked-Straw White 
Siiiciuus saadv loam . 
47 
1050-0 
178'3 
1228-3 
44 
Ditto 
Ditto " . 
45 
1327-0 
203-2 
1530-2 
45 
Ditto 
f Calcareous, brashy, > 
I and shallow . . / 
42 
852'5 
192-2 
1044-7 
46 
Ditto 
Clay loam . 
46 
U23-0 
20S"4 
1328-4 
47 
Ditto 
t Calcareous and silici- \ 
\ ous sand w itli clay > 
42 
1313-0 
197 0 
1510-0 
48 
Ditto 
CalcarRous clay . 
36 
981-6 
180-4 
1162-0 
49 
Ditto 
Adhesive loam , , 
53 
116S-0 
240-5 
1405-5 
The specimens give a mean — 
For the straw . ' . . 1116* 
„ chaff . . . 199-6 
Straw and chaff . 1315' 6 
Mean length of straw, 44 - 3 inches. 
It will be seen that the highest nvmiber in the series does not 
much exceed 1500 of straw and chaft" to 1000 of grain. 
The chaflf of the red-straw white wlieat, it will be observed, is 
larger in quantity than that of the Hopeton. This is probably a 
peculiarity of the variety. How far may this variation in the chaff 
affect the ripening of the two varieties? 
We next give a table of the same kind, embracing 15 specimens 
of different kinds of wheat received from Sir J. Jolnistone. We 
have purposely omitted from the list a specimen of red Britannia 
(Spec. 22), which is so different in the proportion of straw, as 
greatly to affect the mean, if it were taken into the calculation. 
Sir John Johnstone's specimens were all bagged, and therefore 
