11. The process of tanning calf-skins is somewhat different in many of its details. They are first put into a solution of lime, where they remain during ten or fifteen days, and are then scraped on both sides on the beam, with a circular knife, as in the former case, and for the same purpose. They are then washed in water, and afterwards immersed in an infusion of hen or pigeon's dung. Here they are left for a week or ten days, according to the state of the weather and other circumstances; during which time, they are frequently handled, and scraped on both sides. By these means, the lime, oil, and saponaceous matter, are discharged, and the skin is rendered pliable.
12. They are next put into a vat containing weak ooze, and afterwards removed to several others of regularly increasing strength. In the mean time, they are taken up and handled every day, that they may be equally acted upon by the tanning principle. The time occupied in the whole process, is from two to six months. The light and thin sorts of hides, designed for upper leather, harnesses, &c., are treated in a similar manner.
13. The tanner procures his hides and skins from various sources, but chiefly from the butcher, and from individuals who kill the animals for their own consumption. Great quantities of dry hides are also obtained from South America, where cattle are killed in great numbers, principally for the sake of this valuable envelope of their bodies.
THE CURRIER.
1. It is the business of the currier to dress the thinner kinds of leather. In most cases, in the United States, except in and near large cities, the business of tanning and currying are usually united in the same individual; or, at least, the two branches of business are carried on together, by the aid of workmen, skilled in their respective trades.
2. The mode of dressing the different kinds of skins, varies in some respects; but, as the general method of operating is the same in every sort, a description applicable in one case will convey a sufficiently accurate idea of the whole. We shall, therefore, select the calf-skin, since it is more frequently the subject of the currier's skill than any other.
3. The skin is first soaked in water, until it has become sufficiently soft, and then shaved with the currier's knife, on the inner side, over the currier's beam. It is then placed on a table, somewhat inclined from the workman, and scoured on both sides with the edge of a narrow, smooth stone, set in a handle, and again, with an iron sleeker of a similar shape. The skin is next stuffed with a composition of tallow and tanner's oil, on the flesh side, and then hung up to dry. Afterwards it is rubbed on the hair side with a board, and again scraped on the flesh side with the knife. Having been thus prepared, the skin is blacked on the flesh side with lampblack and tanner's oil, and subsequently rubbed with paste, applied with a brush. When it has been dried, the whole process is finished by rubbing both sides with a glass sleeker.
4. Horse hides are blacked on the hair side, or, as the curriers term it, on the grain, with a solution of copperas water. Leather designed for harnesses, for covering carriages, and for other similar purposes, is also blacked on that side in the same manner.
5. The trade of the currier is divided into two or three branches. Some dress only calf-skins and other thick leather designed for shoes, harnesses, and carriages; others confine themselves to dressing skins, which are to be applied to binding books, and to other purposes requiring thin leather. It may be well to remark here, that the dressers of thin leather usually tan the skins themselves, using the leaves of sumach, instead of bark.