The Bushmen do this. The water oozes through the membrane, and by its evaporation the contents are kept very cool. Another plan is, after having tied a length of intestine at both ends, to roll it up in a handkerchief and wear it as a belt round the waist. The fault of these membranous bags, besides their disgusting character and want of strength is, that they become putrid after a few days' use.
Vessels for Cooling Water may be made that shall also act efficiently as flasks. Porous earthen jars are too brittle for long use, and their pores choke up if slimy water be put inside them. But the Arabs use a porous leather flask, called a Zemsemiya, which is hung on the shady side of the camel, and by evaporation keeps the water deliciously cool: it is a rather wasteful way of carrying water. Canvas bags are equally effective.
Open Buckets, for carrying water for short distances, or for storing it in camp, may be made of the bark of a tree, either taken off in an entire cylinder, and having a bottom fitted on, or else of a knot or excrescence that has been cut off the outside of a tree, and its woody interior scooped out; or of birth bark sewed or pegged at the corners, and having its seams coated with the gum or resin of the pine-tree. Baskets with oiled cloth inside, make efficient water-vessels; they are in use in France as firemen's buckets. Water-tight pots are made on the Snake river by winding long touch roots in a spiral manner, and lashing the coils to one another, just as is done in making a beehive. Earthenware jars are excellent, when they can be obtained.
To prevent Splashing.--When carrying water in buckets, put a wreath of grass, or something else that will float, on the water, to prevent it from splashing; and also make a hoop, inside which the porter may walk, while his laden hands rest on its rim: the hoop keeps his hands wide from his body, and prevents the buckets from knocking against his legs.
Mending Leather Water-vessels.--If a water-vessel becomes leaky, the hole should be caulked by stuffing a rag, a wedge of wood, a tuft of grass, or anything else into it, as shown in the upper figure and also in the left side of the lower one (p. 230), and then greasing or waxing it over. A larger rent must be Seized upon, the lips of the wound pinched up, a thorn or other spike run through the lips, and lastly a piece of twine lashed firmly round, underneath the thorn; the thorn keeps the string from slipping off (See the right-hand corner of the lower figure.) When there is an opportunity, the bag must be patched, as is also shown in the lower figure.
Repairing a battered Metal Flask.--Fill it with dry seed, such as peas or mustard-seed; then pour in water and put the stopper into it. After a period varying from 1 to 3 or 4 hours, according to the nature of the seeds, they will begin to swell and to force the sides of the flask outwards into their original shape. The swelling proceeds rather rapidly after it has once commenced, so the operation requires watching, lest it should be overdone and the flask should burst.
Corks and Stoppers.--Thrust a cork tightly into the mouth of the flask, cut a hole through the cork and plug the hole, which will henceforth form the outlet of the flask--with a stopper of wood, bone, or other hard substance. Thread, wound round a slightly conical plug that has been sufficiently notched to retain it in its place, makes it nearly water-tight as a stopper. It is of less importance that the stopper should fit closely, if the flask be so slung that its mouth shall be always uppermost: a very imperfect cork will then be sufficient to check evaporation and splashing, and to prevent the loss of more than a few drops from occasional upsets.
Drinking, when riding or walking.--It is an awkward matter to drink when jolting on wheels, on horseback, or on foot. I adopted the plan of carrying a piece of small india-rubber tubing 6 or 8 inches long, and when I wished to drink, I removed the stopper and inserted the tube, just as an insect might let down its proboscis, and sucked the contents. Sir S. Baker says of the people of Unyoro, "During a journey, a pretty, bottle-shaped, long-necked gourd is carried with a store of plantain-cider; the mouth of the bottle is stopped with a bundle of the white rush shreds, through which a reed is inserted that reaches to the bottom: thus the drink can be sucked up during the march, without the necessity of halting; nor is it possible to spill it by the movement of walking."
Kegs and Tanks.--Kegs for Pack-saddles.--Small barrels, flattened equally on both sides, so that their tops and bottoms shall be of an oval and not a circular shape, are the most convenient vessels, notwithstanding their weight, for carrying water on pack-saddles across a broken country. They are exceedingly strong, and require no particular attention, while bags of leather or macintosh suffer from thorns, and natives secretly prick them during the march, that they may suck a draught of water. These kegs should not exceed 22 inches in length, 10 in extreme breadth, and 7 in extreme width; a cask of these measurements would hold about 40 lbs. weight of water, and its own weight might be 15 lbs. As the water is expended, it is easy to replace the diminished weight by putting on a bag from one of the other packs. Before starting away into the bush, these kegs should be satisfactorily fitted and adjusted to the pack-saddle that is intended to carry them, in such a way that they may be packed on to it with the least possible trouble. A couple of leather or iron loops Fixed to each keg, and made to catch on to the hooks which are let flush into the sides of the pack-saddle, will effect this.