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acetic acid action on skin added albuminous alcohol alkaline amines ammonia ammonium amount artificial bates Bacillus bacteria bacterium bating action bating liquor bating process bodies bran drench butyric acid calcium carbonate cent Chapter Chem chemical chloride coli colloidal colonies colour compounds concentration containing decomposed deliming described dextrin digestive diluted dissolved distilled dog dung dung bate enzymes erodin experiments fermentation filtered formic gall gases gelatin glucose grain hides inoculated intestinal intestinal juice juice lactic acid leather limed skin liquefied liquid litre matter method mixture neutral nitrogen nutrient medium obtained organic acids paddle pancreatic pancreatic juice Patent pepsin peptones phosphate pigeon dung precipitate present Procter produced proteid puer liquor puered skin pure culture putrefaction quantity reaction salts scudding shown skin substance sodium soluble solution species of bacteria Stab-culture starch sugar surface swelling tanning temperature tion Trent Bridge tube washed
Page 292 - What is a man, If his chief good and market of his time Be but to sleep and feed? a beast, no more. Sure he that made us with such large discourse, Looking before and after, gave us not That capability and god-like reason To fust in us unus'd.
Page 123 - ... every trace of the bacteria and their congeners, and still the putrefactive process is carried on with great vigor. Hence we are wholly disinclined to believe that the bacteria are the only, or even (in the end) the chief organic agents of putrefaction; for most certainly in the latter stages of the disintegration of dead organic matter the most active agents are a large variety of flagellate monads.
Page 293 - ... is one which all interested in the scientific side of the leather trade must possess. To the practical leather manufacturer the book may be a disappointment, as the author does not deal with the old practical difficulties. Mr. Wood describes his book in the concluding chapter as follows :• — " Limited in extent, imperfect in execution, and in parts only suggestive in character, this little book may perhaps serve as a foundation on which students of the science of tanning may raise the superstructure...
Page 283 - VILLON, AM Practical Treatise on the Leather Industry. With many tables and illustrations and a copious index. A translation of Villon's "Traite Pratique de la Fabrication des Cuirs et du Travail des Peaux,
Page 117 - In any putrefying matter, such as gelatin or albumin, a large number of different species of bacteria may be observed as well as monads and infusoria, and in some cases moulds, all of which take part in the process. The first stage is a process of oxidation in the presence of air, in which aerobic bacteria use up the oxygen present and only simple inorganic compounds are formed, carbon dioxide, nitrates and sulphates; this part of the process is generaly without odour.
Page 55 - The most important aspect of any phenomenon from a mathematical point of view is that of a measurable quantity. I shall therefore consider electrical phenomena chiefly with a view to their measurement, describing the methods of measurement, and defining the standards on which they depend.
Page 193 - ... synthesis. In the following pages it is intended to give a general survey of the principal condensation processes. Nature of Condensation Processes. The examples of condensation (of which ring formation may be regarded as a special case) are so numerous and at the same time so varied in character that it would be impossible within the limits of a single chapter to enumerate them in anything like detail. Nevertheless, it is possible to lay down certain broad generalisations under which the different...
Page 118 - Hauser (58), who, in 1885, isolated from putrefying flesh the three organisms—Proteus vulgaris, P. mirabilis, and P. zenkeri. He studied the action of these in pure cultures, and came to the following conclusions :— That Bacterium termo (Ehr.) is not a single definite species; various forms and stages of other organisms have been described under this name. The various species of Proteus go through a wide range of forms during their development in which cocci, short and long rods. thread forms,...
Page 119 - Proteus vulgaris, this group decompose albumin by means of tryptic enzymes. (2) Mixed peptolytic ferments are only able to attack the albumin when it has undergone a preliminary decomposition. This group comprises B. coli, B. filiformis, Streptococcus pyogenes, Diplococcus griseus non liquefaciens. The second class of bacteria are those which are without action on carbohydrates, and only attack proteids ; these consist of the true proteolytic bacteria B. putrificus, and B. putidus gracilis, and the...