the returning flight of the boomerang. On the whole, it would be rash to assert that the principle of the boomerang was quite unknown in the Old World. Another remarkable weapon, the bolas, seems to be isolated in the particular region of South America where it was found in use, and was therefore very likely invented there; but its principle is known also among the Esquimaux, whose thin thongs, weighted with bunches of ivory knobs, are arranged to wind themselves round the bird they are thrown at, in much the same way as the much stouter cords, weighted at the ends with two or three heavy stone balls, which form the bolas of the Southern continent.
A few more instances may be given, rather for their quaintness than for their importance. The Australians practise an ingenious art in bee-hunting, which I have not met with anywhere else. The hunter catches a bee, and gums a piece of down to it, so that it can fly but slowly, and he can easily follow it home to the hive, and get the honey. The North American bee-hunters do not use this contrivance, but they put a bait of honey on a flat stone and surround it with a ring of thick white paint, across which the bee crawls to take flight from the edge of the stone, and at once clogs and marks itself.[1] Again, there is the curious art of changing the colour of a live macaw's feathers from blue or green to brilliant orange or yellow, by plucking them and rubbing some liquid into the skin (it is said the milky secretion from a small frog or toad), which causes the new feathers to grow with a changed colour.[2] This is done in South America, but, so far as I know, not elsewhere; and it seems reasonable to suppose that it was invented there. Travellers in the Malay Peninsula and Sumatra describe the thrilling effect of the tones, as of flutes and organs, that seem to grow out of the air as they approach some hamlet, sometimes single and interrupted notes rising, swelling into a burst of harmony, and dying away. These sounds are produced by bamboos fixed up in the trees, slit between the joints so that
