An inaugural dissertation, on the chemical and medical properties of the persimmon tree, and the analysis of astringent vegetables : submitted to the examination of the Revd. John Ewing, S.T.P. provost ; the trustees and medical professors, of the University of Pennsylvania ; for the degree of Doctor of Medicine / by James Woodhouse, A.M. ; honorary member of the American and Philadelphia medical societies.
- James Woodhouse
- Date:
- [1792]
Licence: Public Domain Mark
Credit: An inaugural dissertation, on the chemical and medical properties of the persimmon tree, and the analysis of astringent vegetables : submitted to the examination of the Revd. John Ewing, S.T.P. provost ; the trustees and medical professors, of the University of Pennsylvania ; for the degree of Doctor of Medicine / by James Woodhouse, A.M. ; honorary member of the American and Philadelphia medical societies. Source: Wellcome Collection.
Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)
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![C ft ] EXPERIMENT VII. The foluble and infoluble parts, feparately boiled in the nitrous acid, yields long prifmatic chryfials, which pof- fefs the fame properties, as the acid obtained from fac- charine fubflances, and which has improperly been nr.m- ed the acid of fugar. EXPERIMENT VIII. A quantity of the black feculant matter, precipitated from green vitriol, by the aftringent juice, was collected, dried, and found to poffefs the following properties. It undergoes no alteration from being expofed to the action of the air, for twelve months. Expofed to a bright red heat, it does not inflame, but burns like the calces of metals, and is reduced to its metallic form. Digefted in a iblution, of the mild orcauftic vegetable alkali, or the mild and cauflic volatile alkali, it tinges the liquor of a dirty brown color, which mixed with a folution of green vitriol, precipitates the iron, of a brown or purple color. EXPERIMENT IX. The unripe juice, fpread with a feather, over an ancient decayed writing, reftored the legibility of the letters, which inftantly appeared of a deep black color. EXPERIMENT X. The vegetable and volatile alkalies, added to the unripe juice, formed a coagulum, which being feveral times waffl- ed in warm water, did not tafte aftringent; was infoluble in water and fpirit of wine, but readily diilblved, in weak vitriolic acid.](https://iiif.wellcomecollection.org/image/b21165373_0013.jp2/full/800%2C/0/default.jpg)
