The skins should be turned inside out before the bent twig is inserted; its own spring keeps the skin distended until dry, when it is removed and the skin packed; or a long lancet-shaped board, with a hole in it, may be used for stretching the skins of marmots, musk rats, &c. One of these is represented in the illustration representing stretching boards, and has a hole in it to be used for suspending the skins whilst drying. Stretching boards must be made of sizes proportioned to the skins they are intended for. Never dry skins either by the fire or in the sun.
A variety of methods are had recourse to for preparing the skins of animals useful to the traveller and explorer, by whom they can be employed either in a raw state, simply dried, or as leather. Raw hide, as it is called, is one of the most valuable and useful materials at the command of the traveller or hunter. It is to him a substitute for metal, rope, and twine, and with it breakages of the most extensive and apparently hopeless character can be effectually repaired. Lashings of raw hide for immediate use can be cut from the skin of an animal just killed. This, when tightly and evenly adjusted over a fractured object, contracts as it dries, and binds all firmly together. The hair may be removed from hides by soaking them in lime-water or placing them in the earth for a few days. Many of the African tribes prepare hides for use as garments, &c., by first pegging them out on the ground, trimming them clean, allowing them to dry slowly, and then braying their surfaces with a soft sand brick. Skins thus prepared wear well, so long as no water is allowed to reach them.
Skins may be “tawed,” as it is called, by placing them to steep in a strong solution of alum and common salt. Hides collected in large numbers for transmission to the home market are usually salted or pickled. Settlers and colonists may find this mode of preserving skins of value, so we give Mr. Danna’s account of the process, which will be found thoroughly practical, and can be relied on. Speaking of the treatment of hides brought to the sea side for shipment, he says: “The first thing is to put the hides to soak. This is done by carrying them down at low tide, and making them fast in small piles by ropes, and letting the tide come up and cover them. Every day we put twenty-five in soak for each man, which, with us, makes 150. There they lie forty-eight hours, when they are taken out and rolled up in wheelbarrows, and thrown into vats. These vats contain brine, made very strong, being sea-water with great quantities of salt thrown in. This pickles the hides, and in this they lie forty-eight hours; the use of the sea-water into which they are first put being merely to soften and clean them. From these vats they are taken to lie on a platform twenty-four hours, and are then spread upon the ground and carefully stretched and staked out, so that they may dry smooth. After they were staked, and while yet wet and soft, we used to go upon them with our knives and carefully cut off all the bad parts, the pieces of meat and fat which would otherwise corrupt and affect the whole if stowed away in a vessel for months, the large flippers, the ears, and all other parts that prevent close stowage. This was the most difficult part of our duty, as it required much skill to take off everything necessary, and not to cut nor injure the hides. It was also a long process, as six of us had to clean 150, most of which required a great deal to be done to them, as the Spaniards are very careless in skinning their cattle; then, too, as we cleaned them while they were staked out, we were obliged to kneel down upon them, which always gives beginners the back ache. The first day I was so slow and awkward that I only cleaned eight; at the end of a few days I doubled my number, and in a fortnight or three weeks could keep up with the others, and clean my proportion—twenty-five.” Skins of animals may be fitted for transport from the hunting grounds to a camp or depôt situated at a distance of several days’ journey, by pegging them tightly out; and then, when thoroughly freed from adhering fat, giving them a thorough sprinkling with wood ashes. Small quantities of leather may be made by sinking large native jars in the earth, partly filling them with tan, which is yielded by an almost endless number of trees and shrubs. Water, when added, extracts the tanning principle, and allows of its soaking freely into the pores of the skin under treatment. It is a good plan to make use of several jars arranged in a row; these should all contain strong bark or tan water, and as the skin becomes partly tanned in jar No. 1 it should, after being well squeezed and pressed, be passed to No. 2, and so on through the set.
Thus writes Sir Samuel Baker on the subject of skin dressing: “My antelope skins are just completed, and are thoroughly tanned, each skin required a double handful of the ‘garra’ or fruit of the Acacia arabica. The process is simple. The skin being thoroughly wetted, the garra is pounded into a paste; this is rubbed into the hide with a rough piece of sandstone until it becomes perfectly clean and free from impurities; it is then wrapped up with a quantity of the paste, and is deposited in a trough, and kept in the shade twenty-four hours—it should undergo a similar rubbing daily, and be kept in the trough to soak in the garra for four or five days. After this process it should be well rubbed with fat, if required to keep soft and pliable when wetted. If soaked with milk after tanning, the leather will become waterproof. The large tanned ox hides used by the Arabs as coverlets are perfectly waterproof, and are simply prepared with milk. These are made in Abyssinia, and can be purchased from ten piastres to a dollar each. The Arabs thoroughly appreciate the value of leather, as they are entirely dependant upon such material for coverlets, water sacks, travelling bags, &c. The sac de voyage is a simple skin of either goat or sheep, drawn off the animal as a stocking is drawn from the leg. This is very neatly ornamented and arranged with loops which close the mouth, which is secured by a padlock. Very large sacks, capable of containing three hundred pounds of corn, are made in the same manner by drawing entire the skins of the larger antelopes; that of the tetel is considered the most valuable for this purpose. The hide of the wild ass is the finest of all leather, and is so close in the grain, that, before tanning, when dry and hardened in the sun, it resembles horn in transparency. I have made excellent mocassins with this skin, which are admirable if kept wetted.” Most of the water sacks we used in Central India were prepared by withdrawing all the body of the animal—antelope or goat—piecemeal through the orifice left by cutting off the head. The legs were then removed to the hoof joint, and the tubes so formed so fitted with thongs, that they could be tied fast or left open at the will of the owner; burying the skin in the earth for a day or two caused the hair to become loose enough to rub off in water. A charge of pounded pomegranate rind mixed with water was then introduced to the interior of the skin sack, and well shaken about several times during the day. This process was continued until the substance of the skin became converted into leather, and was perfectly free from the slightest tendency to taint. The neck orifice was then either sewn up with a thong, or left with a string round it, to be closed or left open as might be most convenient. Skins thus prepared we have found useful for an almost endless number of purposes.
The following directions for the manufacture of gazelle skin girbas, or water sacks, as practised by the Arabs, given by Sir Samuel Baker, will not fail to prove of interest and value to the reader: “The flaying process for this purpose is a delicate operation, as the knife must be so dexterously used that no false cut should injure the hide. The animal is hung up by the hind legs, an incision is then made along the inside of both thighs to the tail, and with some trouble the skin is drawn off the body towards the head, precisely as a stocking might be drawn from the leg; by this operation the skin forms a seamless bag, open at both ends. To form a girba, the skin must be buried in the earth for about twenty-four hours; it is then washed in water, and the hair is easily detached. Thus rendered clean, it is tanned by soaking for several days in a mixture of the bark of the mimosa and water, from this it is daily withdrawn and stretched out with pegs, upon the ground; it is then well scrubbed with a rough stone, and fresh mimosa bark, well bruised, with water is rubbed in by friction. About four days are sufficient to tan the skin of a gazelle, which is much valued for its toughness and durability. The aperture at the hind quarters is sewn together, and the opening of the neck is closed when required by tying. A good water-skin should be porous, to allow the water to exude sufficiently to moisten the exterior; thus the action of the air upon the exposed surface causes evaporation and imparts to the water within the skin a delicious coolness. The Arabs usually prepare their tanned skins with an empyreumatical oil, made from a variety of substances, the best of which is that from the sesame grain. This has a powerful smell and renders the water so disagreeable that few Europeans could drink it. This oil is black and much resembles tar in appearance, it has the effect of preserving the leather and of rendering it perfectly water tight. In desert travelling, each person should have his own private water skin slung upon his dromedary; for this purpose none is so good as a small sized gazelle skin that will contain about two gallons.”
Snake skins can be converted into very useful and highly ornamental leather by tanning them. The Indians of North-west America add greatly to the value and durability of their prepared skins by subjecting them to the smoking process. This is conducted by forming a miniature skin tent over a narrow deep hole dug in the earth; this, when filled with damp slow burning fuel, gives forth, when lighted, dense volumes of smoke, which, acting on the inner or flesh sides of the spread skins, imparts to them considerable power to resist damp and other deteriorating influences. Hides that are under the operation of dressing should never be allowed to become dry, as it is very difficult to restore perfect flexibility to them by the aid of water. Wet cow dung is the best material we know for preserving the moisture of the skins on which it is spread. Milk curds are made use of for the same purpose by the Tartar tribes. We have also seen ground oil seeds, converted into a paste with milk, used by some Indian hill tribes.
Parchment and catgut.
