A Text-book of Tanning: A treatise on the conversion of skins into leather, both practical and theoretical. — John Shaqi
A Text-book of Tanning: A treatise on the conversion of skins into leather, both practical and theoretical.Procter, H. R. (Henry Richardson)
Science
A Text-book of Tanning: A treatise on the conversion of skins into leather, both practical and theoretical.
Procter, H. R. (Henry Richardson)
Tanning
The Greek crop in 1880 was much damaged by the cold spring: It gave
600 tons in Acarnania and Ætolia, 650 in Cape Papa, and 1400 in Mania;
total, 2650 tons. Calamata and Messenia produced 115 tons, 1700_l._
Syra exported in 1879, 1174_l._ worth to Great Britain, 348_l._
Austria, 259_l._ Russia, 250_l._ Turkey, 178_l._ Egypt. Hungary
exported 942 tons in 1880. Adana shipped 9450_l._ worth in 1878; and
Dedeagatch, in the same year, 1,500,000 lb., 9000_l._ Musyna [Mersineh]
sent 670 tons, 3350_l._, to Italy, and 450 tons, 2250_l._ to Austria,
in 1879; and 480 tons, 2240_l._, to Italy, and 128 tons, 640_l._, to
Greece, in 1880. Our imports in 1880 were:--From Turkey, 30,391 tons,
471,637_l._; Greece, 2916 tons, 41,312_l._; other countries, 466 tons,
7105_l._; total, 33,773 tons, 520,054_l._ The approximate London
market values are:--Smyrna, 12_s._ 6_d._-20_s._ 6_d._ a cwt.; Camata,
15_s._-19_s._; Morea, 10_s._ 6_d._-18_s._
=Miscellaneous.=--Besides the foregoing tannins, which already occupy
prominent places in European and American commerce, there are many
others as yet of minor importance, but possessing qualities which may
bring them into note in the near future. They are as follows:--
_Abies Larix_ bark, the larch, contains 6-8 per cent. of a red tannin.
_Acacia albicans_ fruits, the _hiusache_ of Mexico, are used as
substitutes for gall-nuts, costing locally about 5_d._ a lb. _A.
arabica_, the _babul_ of India, yields a tannin which gives a nearly
pure-white precipitate with gelatine: the proportions are 12·55 per
cent, in trunk-bark, 18·95 in branch-bark, 15·45 in twig-bark. The
supply is unlimited. It works well with myrobalans. _A. Cebil_, the red
cebil of the Argentine Republic, contains 10-15 per cent. of tannin in
the bark, and 6-7 per cent. in the leaves; another variety, the white
cebil, contains 8-12 per cent. in the bark, and 7-8 per cent. in the
leaves. _A. Cavenia_, the _espinillo_ of the Argentine Republic, has
33-34 per cent. of tannin in the fruit-husks. _A. penninervis_ bark,
the "hardy" acacia of Australia, contains 18 per cent. of tannic acid
and 3-4 of gallic.
_Alnus glutinosa_ bark, the common alder, contains about 16 per cent.
of tannin.
_Cœsalpinia Cacalaco_ fruits, the _cascalote_ of Mexico, are very rich
in tannic and gallic acids, and are locally used for tanning.
_Comptonia asplenifolia_ leaves, the sweet-fern of the United States,
contain 9-10 per cent. of tannin.
_Coriaria ruscifolia_ bark, the _tutu_ of New Zealand, contains 16-17
per cent. of tannin.
_Elæocarpus dentatus_ bark, the _kiri-hinau_ of New Zealand, contains
21-22 per cent. of tannin. _E. Hookerianus_ bark, the _pokako_ of New
Zealand, contains 9-10 per cent. of tannin.
_Ephedra antisyphilitica_, on the tablelands of Arizona and Utah, gives
11-12 per cent. of tannin.
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