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Company and use natural air to give them the buoyancy needed to keep them afloat. The air is trapped in the top of the bags which, with their load, are guided through the water either by swimmers or by guy lines.
The bags are made of heavy duck coated both inside and outside with natural and reclaimed-rubber compounds. They are not more than ~ inch thick and vary in weight from 3 to 8 pounds, depending upon size and carrying capacity. They serve primarily to get medical supplies, instruments, and food ashore, as well as Signal Corps equipment, so that field hospitals can be set up and telephonic and radio communication established without delay. With that work done, they are used to protect materials in outdoor storage. These bags will withstand complete submergence in water for more than six days without letting in a drop of water or permitting dampness to penetrate.
R. H.O.
Curare--Poison and Medicine.--A recent issue of. Agriculture in the Americas, a monthly publication of the Office of Foreign AgriculturM Relations, U. S. Department of Agriculture, contains an article by J. Gordon I.eahy of which the following are excerpts.
"The South American arrow poisoff~which was first mentioned in the English language in 1596 in Richard Hakluyt's description of Sir Walter Raleigh's expedition to British Guiana is curare, a poison that is still being used on blowgun darts in sections where amnunition and guns are difficult to obtain.
"'The making of curare generally consists of boiling down a concoction of selected ingredients from bark, roots, stems, and tendrils of the different species of plants, skimming off impurities, filtering the residue, adding the chosen catalytic agents (such as Anuona ambotay, Capparis sola, or others), and boiling to a syrup. The syrup is exposed to the sun in flat earthen vessels so that the curare will thicken into a paste. When ready it is placed in clay gourds, or calabashes, that are tightly covered. It is often put into bamboo tubes to be exchanged for the goods of other tribes and hunters unable to make curare, if the curare loses strength, this can be restored by adding the juice of Manihot utilissima or Annona ambotay and burying it in a wellcovered calabash set in warm earth for a day or two.' "Today curarine, the alkaloid extracted from curare, is used in medicine to protect patients against injuries likely to occur in shock therapy/for mental diseases, and in many cases it has made this shock treatment possible for persons who otherwise would have been unable to stand it. The drug is valuable, too, in eye, ear, nose, and throat work and for certain diagnosis and surgical operations, but it is not an anaesthetic.
"From the crude use of curare on the darts of savages to its highly specialized and carefully controlled use in modern medicine is a long jump." R. H. O.
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