74 Dr. Heberden’s account of the heat of July, 1825 ; &c. 
so much the effect of wind exceeds that of mere moisture. 
It is by walking, or riding, in such a state of the atmosphere, 
that we produce on our bodies a current of moist air, which 
is then felt in proportion to the rapidity with which we pass 
through it. If it were thought worth while to bring this to 
the test of the thermometer, the instrument should be made 
to pass through the air at the same rate as the person would 
move. 
