Animals of experience (including men) are more skilful in adjusting themselves to environmental exigencies than the young and inexperienced, because of their store of initial impressions. It is a matter of common observation that young animals are more easily caught or killed or otherwise victimised than the old and experienced. Many animals, however, (and a good many men) are able to profit by a single impression. One dose of tartar emetic is generally sufficient to cure an egg-sucking dog, and it is a very stupid canine indeed that does not understand perfectly after one or two experiences with a porcupine or an unsavory skunk. ‘The burnt child dreads the fire,’ but so does the burnt puppy. Rengger states that his Paraguay monkeys, after cutting themselves only once with any sharp tool, would not touch it again, or would handle it with the greatest caution.[1] Older trout are more wary than young ones, and fishes that have been much hunted and deceived become suspicious of traps. Rats, martins, and other animals cannot long be trapped in the same way, and partridges and other birds seldom fly against telegraph-wires the second season after the wires are put up. These animals, however, cannot learn to avoid these dangers from experience, for only a few of them are ever caught or struck. They must learn it from observing their unfortunate companions. Everyone who has read the story of Lobo, the big gray wolf of the Carrumpaw, cannot but wonder at the remarkable shrewdness shown by this old leader in baffling for years the tigers that hung upon his tracks.[9] Nansen states that the seals, before man invaded the Arctics, occupied the inner ice-floes to avoid the polar bear, but after man came they took to living on the outer floes in order to escape the persecutions of this new and more fearful enemy. Domestic animals, when first turned out in new regions, often die from eating poisonous weeds, but in some way soon learn to avoid them. Many animals, when pursuing other animals, or when being pursued, display a knowledge of facts very little understood by the majority of mankind, such as of places where scent lies or is obliterated, and the effects of wind in carrying evidence of their presence to their enemies. The hunted roebuck or hare will make circles, double on its own tracks, take to water, and fling itself for considerable distances through the air as cleverly as if it had read up all the theory of scent in a book. According to the London _Spectator_ one of the large African elephants in the Zoological Gardens of that city restores to its entertainers all the bits of food which on being thrown to him fall alike out of his reach and theirs. He points his proboscis straight at the food, and blows it along the floor to the feet of those who have thrown it. He clearly knows what he is about, for if he does not blow hard enough to land the food the first time, he blows harder and harder until he does. The