114 Report of Experiments on the Growth of Wheat. 
In June, August, and September, the dew-point was rather 
below, but in July rather above the average ; and the degree of 
humidity of the air was in June considerably below, in July and 
August somewhat above, and in September somewhat below the 
average. 
The harvest was late, the wheat-crops much laid, and the yield 
per acre was estimated to be below the average. 
With few exceptions, which it is not necessary to notice here, 
the manures applied in the experimental field were much the 
same as in the two preceding seasons. The following is a sum- 
mary of the results : — 
Table VII.— Summary of the Results of the Seventh Season, 1849-50. 
Manures. 
(Quantities per Acre.) 
Produce per Acre, &c. 
I Dressed Corn. 
Total 
Corn. 
Straw 
and 
Chaff. 
, Quantity. 
Weight 
per 
Bushel. 
400 lbs. Ammonia-salts alone (equal parts Sul-) 
400 lbs. Ammonia-salts (equal parts Sulphate^ 
and Muriate), and Mineral Manure ; mean of 
16 experiments (Plots 6a, 66, 11a, 116, 12a,| 
126, 13a, 136, 14a, 146, 16a, 166, 17a, 176, 18a, 
500 lbs. Ammonia-salts (equal parts Sulphate) 
and Muriate), and Mineral Manure ; mean of j 
400 lbs. Ammonia-salts (equal parts Sulphate] 
and Muriate), Mineral Manure, and 500 lbs. ( 
l{ape-cake ; mean of 2 experiments (Plots 7a I 
Butt, Pks. 
15 B| 
28 2 
19 li 
26 3| 
30 3| 
30 If 
32 0£ 
lbs. 
60-6 
Gl'9 
60- 8 
60'2 
61'0 
60'4 
61- 1 
lbs. 
1002 
1861 
1220 
1721 
1991 
1996 
2123 
lbs. 
1719 
3245 
2037 
3089 
4063 
4442 , 
4383 
Under the influence of the cold and unsettled summer of 1850, 
the produce of corn in the experimental field was several bushels 
less than under parallel conditions of manuring in 1849, but that 
of straw was considerably more ; and the weight per bushel of 
dressed corn, though much lower than in 1849 and several other 
years, was above the average of the 20 years. 
The proportion of increase when ammonia-salts were used 
alone was even greater than in some of the earlier years ; in fact, 
only 2 bushels per acre less than where the same amount of am- 
monia-salts was used in conjunction with mineral manure ; the 
quantity of straw was, however, proportionally much greater 
where the mineral manure was also employed. Again, unlike 
