e found to unite, economy, convenience, and
effect, joined to a considerable saving to those who are not
themselves judges of such erections, or how they should be disposed.
An experience of twenty-five years in both businesses, accompanied by
a diligent and attentive practice, justifies these assertions.

His terms will be found reasonable, and all letters (post paid)
addressed to Joseph Coppinger, 193 Duane-street, New-York, will
receive attention.

A few copies of this work may be had by applying as above; but any
number may be had at 45 John-street.

TANNING.

The following is the French mode of tanning all kinds of leather in a
short time, highly important to the manufacturers of leather in this
country, as it points out a secure and profitable mode of turning their
capital twelve or thirteen times in a year, instead of once.

_Washing Hides._

The best method of washing hides is to stretch them in a frame, and
place them, thus stretched, in running water. If running water cannot
be conveniently had, still water can be made to answer by frequent
stirrings and agitations; the remainder of the operation of cleansing
is performed as in the common way.

_On taking off the Hair._

Begin by shaking some lime in a pit, to which put a great quantity of
water, then stir this water well, that it may become saturated with the
lime, then place your hides in the pit perpendicularly; for this
purpose, several wooden poles should be fixed across the pit; to these
poles the hides are to be fastened with strings at proper distances,
each hide being first cut in two; whilst the hides were thus placed in
the lime water, the lime itself, which had deposited on the bottom of
the pit, was frequently stirred up to increase the strength of the
water, and to make it more operative; the hair thus treated, will, in
about eight days, come off the hide with great ease. A shorter and a
better method may effect this purpose in two days; that is, to plunge
the hides, after being washed and cleaned, into a solution of tan,
which (having been already used) contains no longer any of the tanning
principle, mixed with a five hundredth, or even a thousandth part of
the oil of vitriol, commonly called sulphuric acid; this operation not
only takes off the hair, but raises and swells the hide; as, in the old
way, is generally effected by barley sourings. However, further
swelling and raising is necessary, and the hides shou