Boys have a natural contempt for cats, and picking them up by the tail, tossing them over the wall, or tying old tin pots to their caudal end, to see how fast they can run, are among their most trifling sports at the expense of Tom and Tabby. I have known a cruel boy to roll a cat in turpentine, and set fire to her. Few men have any feeling but repugnance towards the feline race. The exceptions are in the past. Cardinal Wolsey's cat sat on the arm of his chair of state, or took up her position at the back of his throne when he held audiences; and the cat of the poet Petrarch, after death, occupied, embalmed, a niche in his studio; indeed, poets appear to be more susceptible of pussy's virtues and graces than other persons; and she has, on many occasions, been made the subject of their verse, the sentiment of which fully expresses a sense of the maligned animal's faithfulness and affection. Tasso, reduced to such a strait of poverty as to be obliged to borrow a crown from a friend to subsist on through a week, turns for mute sympathy to his faithful cat, and disburdens his case in a charming sonnet, in which he entreats her to assist him through the night with the lustre of her moon-like eyes, having no candles by which he could see to write his verses. [Illustration: SPORT FOR THE BOYS BUT DEATH FOR THE CAT.] An editor facetiously says, "We have here among us at this time an addition to the M. D.'s in the shape of two cat doctors, who have the terrible idea that they were put upon this earth for the sole object of doctoring cats, and now the mortality list shows, at the least calculation, that no less than eighteen cats and two kittens have travelled to that bourn from which no passengers have ever yet returned, and all because they were the unlucky sons and daughters of ye night prowlers who had been sacrificed for the good of the future cat generation." PRESENT ERRORS. I think some reason for the present errors and superstitions attached to cats, may be attributed to the _cat_-adioptric qualities of their eyes and fur. At night their eyes often shine with phosphoric light, and rubbing their fur with the human hand causes it to emit electric sparks, particularly in very cold weather. They are supposed to partake of ghostly, or witch-like qualities, because they can see in the night time. Fish scales, as well as the flesh of fish, contain a phosphoric principle--there is no witchery about such--which can be seen best through the dark. The fur of other animals besides the cat contain electric qualities. Humans possess it to a greater or lesser extent. The eye of the cat--as also the owl--is made, in the divine economy, expressly for night prowling. The back, or reflecting coat (retina), is white, or light, that it may reflect dark objects. In man, and most animals, it is dark. A light-complexioned person can (_cæteris paribus_) see better at night than one who is dark. In a strong light, it is reversed. So much for cat-optrics.