On the nature of the substance found in the amyloid degeneration of various organs of the human body / by Francis Harris.
- Harris, Francis
- Date:
- 1860
Licence: Public Domain Mark
Credit: On the nature of the substance found in the amyloid degeneration of various organs of the human body / by Francis Harris. Source: Wellcome Collection.
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![6 Freiny* however considered it a non-nitrogenous substance isomeric with cellulose. But on the other hand Lehmann and Schlossberger f both found in it 6.5 of nitrogen. Fremy was unable to obtain sugar from it, nor could he form a detonating mixture with it and the elements of nitric acid, and stated therefore that it had the composition, but not the properties, of cellulose. Schmidt formulated]; itC^^ N Ojp and considered it a union of two substances ; the one a proteine compound Cg Hg N Og; the other a hydro-carbon Cg Hg Og. He obtained this latter formula by subtracting the formula for the muscular tissue of the crab, Cg Hg N Og from the formula for chitine above stated. M. Berthelot inclines to this latter hypothesis in so far that he considers it a union of two substances, the one non-nitrogenous and the other analogous to horny matter. By means of a process exactly similar to that employed with the tunicine he was enabled to obtain a syrup which reduced the potassio-tartrate of copper, and with yeast fermented with the production of carbonic acid and alcohol. The existence in the animal kingdom of these two substances which seem capable of fulfilling in every respect the conditions necessary to establish their perfect analogy with the group of amylaceous substances is a most interesting fact, and a very important link in the chain of evidence which tends to point out the starchy nature of the substances found in certain degenerations of the human tissues, of which I will presently speak. To Virchow § we are indebted for a knowledge of the fact, that certain structures in the human body when brought into contact either with iodine alone, or with iodine and sulphuric acid, exhibit changes of colour similar to those produced under the same circumstances with starch and cellulose. ♦ Annales de Chemie, Tome XLIII. p. 95. 1855. t Thier-Chemie, Vol. I. p. 228. ] Op. cit. p. 50. § Arch. Jur Patholog. Anatom. Vol. VI. p. 135.](https://iiif.wellcomecollection.org/image/b30564517_0007.jp2/full/800%2C/0/default.jpg)
