It is very manifest that the lines D C are shorter than the lines E C: if, therefore, A be the earth, and D G E the boundary of the atmosphere round the earth, then the rays M E C (at the horizon) will pass through more of the atmosphere, than the rays S D C, which are more elevated.
Q. Why does the moon appear larger at her rising and setting, than when above our heads?
A. Because the rays pass through more of the vapoury atmosphere which surrounds the earth; and this vapoury atmosphere magnifies the moon, just like a magnifying glass.
Q. Why do cats rub their ears when it is likely to rain?
A. Either because the air is full of vapour, and its humidity (piercing between the hair of the cat) produces an itching sensation; or more probably, because the air is overcharged with electricity.
Q. How can the electricity of air produce a sensation of itching?
A. If the air is overcharged with electricity, the hair of the cat is overcharged also; and this makes her feel as if she were covered with cobwebs.
Q. Why does the cat keep rubbing herself?
A. Her hair will not lie smooth, but has a perpetual tendency to become turgid and ruffled; so the cat keeps rubbing her coat and ears, to smooth the hair down, and brush away the feeling of cobwebs.