107 
would be laid. Those who farm highly often experience 
this misfortune, and, consequently, dread a wet summer." 
Making, therefore, allowance for bad seed times, which 
occasionally prevail ; for frosts in winter, which constantly 
injure, more or less, the wheat upon some wet soils, and some 
varieties of wheat more than others, and also for wet seasons, 
I, therefore, conclude that, because the produce in the 
tropical and subtropical zones of the earth is in some parts 
enormous ; that the wheats of Australia (12° to 39° S. lat.), 
with a mean temperature in the months of May, June, July, 
and August, of 79°, are of the finest possible descriptions; 
that the wheats of Spain, Poland, and Sicily are superior in 
quality to ours ; that Mr. Lawes, with a mean temperature 
of 63°, in these four months grew wheat on a barren field 
weighing 63| lbs. per bushel, while with a temperature of 
58°, he could only produce, under the same conditions, wheat 
weighing 56^ lbs, and with a temperature of 60°3", that 
weighing 60 J lbs., (these weights and temperatures being 
proportionate ;) that the quality of our grain, and indirectly 
and generally, the quantity of our produce of wheat, are 
dependent upon an exalted temperature of the months in 
question. And hence 
1. In all comparative chemical and agricultural ex- 
periments concerning the production of wheat, climate, 
or the temperature of the season, is an element to be 
taken into the calculation. 
2. A knowledge of the precise effect (if it could be ascer- 
tained) which the climate of these four months has upon the 
produce of wheat, would enable the statesman and the farmer 
to predict, the one, the forthcoming value of his crops, and 
the other, the consequent condition of the country. 
3. If the quality and quantity are determined by seasons, 
and the experiment of Mr. Lawes be even an approximation 
to the truth — that one season made a difference in quantity 
