This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 Excerpt: ...as placing the question of the composition of the celluloses of these lowest types on a basis of well-defined fact. In the first place the author gives an exhaustive bibliography, beginning with the researches of Braconnot (1811), who regarded the cellular tissue of these organisms as a specialised substance, which he ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 Excerpt: ...as placing the question of the composition of the celluloses of these lowest types on a basis of well-defined fact. In the first place the author gives an exhaustive bibliography, beginning with the researches of Braconnot (1811), who regarded the cellular tissue of these organisms as a specialised substance, which he termed 'fungin.' Payen rejects this view, and regards the tissue, fully purified by the action of solvents, as a cellulose (C6H10OJ. This view is successively supported by Fromberg Mulder, Allg. Phys. Chem., Braunschweig, 1851, Schlossberger and Doepping Annalen, 52, 106, and Kaiser. De Bary, on a review of the evidence, adopts this view, but, as the purified substance fails to give the characteristic colourreactions with iodine, he uses the qualifying term 'pilzcellulose' Morph. u. Biol. d. Pilze u. Flechten, Leipzig. 1884. C. Richter, on the other hand, shows that these reactions are merely a question of methods of purification or preparation Sitzungsber. Acad. Wien, 82, 1, 494, and considers that the tissue-substance is an ordinary cellulose, with the ordinary reactions masked by the presence of impurities. In regard to the lower types of fungoid growth, such as yeast, the results of investigators are more at variance. The researches of Salkowski (p. 113) leave little doubt, however, that the cellmembrane is of the cellulosic type. The author's researches extend over a typical range of products obtained from Boletus ed1llis, Agaricus campestris, Cantharellus cioarius, Morchella esculent a, Polyporus officinal1s, Penicillium glaucum, and certain undetermined species. The method of purification consisted mainly in (a) exhaustive treatments with ether and boiling alcohol, (6) digestion with alkaline hydrate (1-2 p.ct. NaOH) in the cold, (c) ac...
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