The Puering, Bating & Drenching of Skins

In Chapter VII. we have described a few of the many artificial bates which have been proposed, and for which in many cases patents have been taken out. It would be impossible wi...

The paper which one of us had the honour of reading before this Section on December 11, 1890,[161] dealt chiefly with methods of bacteriological research, but especially in conn...

The reprints of these papers being no longer available, I have thought it best to print them in the present volume exactly as published, with the exception of the paper entitled...

It is impossible in the space of a short chapter to give an adequate explanation of the physical changes taking place during the puering process. An outline only can be given, a...

When a drop of liquid from a puer wheel in use is examined under the microscope[73] with 1/12 o.i. objective, it is seen to be swarming with bacteria.

Puer liquors, titrated in this manner with N/10 soda or HCl until a potential of 0·69 volts is reached (at which point phenolphthalein turns from colourless to red), gave the fo...

The following short bibliography of works on tanning and the bacteriology of leather manufacture, does not profess to be complete, but is given in the hope that it may prove use...

As may be supposed, inventors have from very early times turned their attention to the substitution of some other material in place of the unappetizing one so long in use. But a...

There are, of course, a large number of putrefactive bacteria in the puer, among these B. putrificus (Fig. 19), isolated by Bienstock; it is a spore-bearing anaerobic bacillus,...

“The living organism is enabled by the use of enzymes to bring about, under ordinary conditions of temperature and moderate concentrations of acid or alkali, many chemical react...

In the manufacture of many kinds of light leathers, skins, after bating, are drenched. The process usually consists in placing the skins in a mixture of bran and water, half to...

Quite recently butyric acid, which is now being manufactured on a commercial scale by the process of Dr. Effront (Brussels), has come into use for deliming.[10] and is likely to...

“Beizen sind Stoffe die mit dem Kalk nicht nur ein chemische Verbindung einzugehen im Stande sind, wodurch derselbe löslich und somit vollständig unschädlich wird, sondern auch...

“And now, as we cannot understand the _frame_ of a _Watch_, without taking it into pieces; so neither can Nature be well _known_, without a _resolution_ of it into its _beginnin...

The effect of puering on the fatty matter in the skin is well known. The fat and grease are partially emulsified, and set free, so that they can be removed by scudding. This act...

chapter that the chemistry and bacteriology of the puer overlap, and that it is difficult, if not impossible, to separate them entirely. The bacteria are continually manufacturi...

*The Reactions of the Puer.*--The organic acids are present principally in the form of the sodium or calcium salts. The intestinal juices contain sodium carbonate, but this is n...

[29] See paper entitled, “The Employment of the Electrometric Method for the Estimation of the Acidity of Tan Liquors,” by H. J. S. Sand, Ph.D. D.Sc., and D. J. Law, B.Sc. F.I.C...

Recently Eberle[27] has proposed to add a proportion of gall juice (bile) to a bate containing pancreatic enzymes, with a view of energizing the latter. This part of the subject...