[grisbi-bugs] Uch better than beer brewed from malt alone; this may be accoun

[Papelian Lingardo]

O 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 should again be
plunged in another quantity of spent tan-water mixed with the one
thousandth part of the oil of vitriol, and thus steeped a second time;
their swelling and raising will be completed in about forty-eight hours;
after this operation the hides will acquire a yellow colour, even to the
interior part of their substance. To determine if the swelling and
raising be sufficiently completed, let one of the corners of the hide be
cut, and if it is in a proper state there will not appear any white
streak in the middle, but the hide throughout its whole substance will
have acquired a yellow colour, and semi-transparent appearance. Mr.
S---- is of opinion, that swelling and raising hides is not necessary,
and that the hides tanned without this operation are less permeable to
water. On tanning on the new principle, as practised by Mr. S----, he
places several rows of casks on stillings sufficiently elevated a
-------------- next part --------------
A non-text attachment was scrubbed...
Name: indenter.jpg
Type: image/jpeg
Size: 15901 bytes
Desc: not available
URL: <http://listes.grisbi.org/pipermail/bugsreports/attachments/20091230/e8e09e45/attachment.jpg>