The wondrous tales of former travellers regarding the preparation of this urary have been rectified long ago. The venom of snakes is not used for it, but the juice of the bruised stems and leaves of several kinds of strychnos and apocyneas is simply boiled over a coal fire, mixed with tobacco-juice and capsicum (Spanish pepper), and thickened with the sticky milk of some Euphorbiacea to a hard mass. This manipulation, moreover, is not undertaken by the old squaws of the tribe, devoting themselves to a painful death thereby, as the old stories ran, but, as there is no danger whatever, by the young wives of the warriors, who look upon it as part of their household duties, or by the men themselves. There are about eight or ten different poisons of similar, but not identical, composition and preparation, of which the urary of the Macusi Indians, and the curare, from Venezuela and New Granada, are considered the most powerful. This dark-brown, pitchy substance, usually kept in little earthen pots, is lightly spread over the points of the weapons,--their long arrows, their light spears, and the thin wooden shafts, of about a foot long, which they shoot through immense blow-tubes (_sarabacanas_). Immediately upon the diffusion in the blood of the slightest portion of the poison, the limbs, one by one, refuse to work, as if overcome with torpor, while the mind apparently retains its activity until death ensues, which it does in a few minutes' time, from palsy of the lungs. It is strange that only those nerves are affected which regulate the movements depending on our own will, whereas those movements we cannot control--the beating of the heart, for example--continue unaltered to the very last. Experiments made by French physicians upon animals have shown that, if the lungs are artificially kept in activity for several hours, the poison will be rejected by natural means, and no bad consequences will ensue. Of late the principal objection to the employment of the urary in medicine--its unequal strength--has been completely overcome by the effective alkaloid--the curarin--being extracted. This is about twenty times as powerful as the urary, and has been used successfully in the treatment of tetanus. The Indians shoot birds and monkeys, which they wish to tame, with very weak curare, rousing them from the lethargy which overpowers them with large doses of salt or sugar-juice; and this treatment is said to be very effective, also, in the reduction of their wildness....