2ndly—As damp relaxes their nerves, they feel languid and uneasy.
Q. Why do candles and fires burn with a bluer flame in wet weather?
A. As the air contains less oxygen in wet weather, the heat of fire is less intense: and the flame is blue, because the fuel is not thoroughly consumed.
Q. Why do hills, &c. appear larger in wet weather?
A. Because (when the air is laden with vapour) the rays of light are more dispersed, and produce a larger reflection; objects, therefore, seen at a distance, appear larger.
Q. Why do trees, &c. in wet weather appear further off than they really are?
A. Because the fog or mist diminishes the light reflected from the object; and as the object becomes more dim, it seems to be further off.
Q. Why does the sun seem larger when he sets and rises, than he does at noon?
A. Because the rays pass through more of the vapoury atmosphere which surrounds the earth; and this vapoury atmosphere acts like a magnifying glass.