The Human Side of Animals. Royal Dixon

Recreation is as common among animals as it is among children (in Colours)	Frontispiece

The Indians claim that the mother bison forced her calf to roll often in a puddle of red clay, so that it might be indistinguishable against its clay background	6

The zebra is one of the cleverest of camouflagers. The black-and-white stripes of his body give the effect of sunlight passing through bushes	7

Monkeys are the most musical of all animals. When they congregate for "concerts," as some of the tribes do, the air is filled with weird strains of monkey-music	20

Cats, unlike dogs, are very fond of music. And it has been proved that their music-sense can be developed to a remarkable degree	21

A happy family of polar bears. The young cubs wrestle and tumble, as playfully as two puppies. This play has much to do with their physical and mental development	34

Dryptosaurus. The prehistoric animals, too, undoubtedly had their play time, with games and "setting up" exercises	35