Notice of a large human calculus in the Library of Trinity College / by J. Cumming.
- Cumming, James, 1777-1861.
- Date:
- 1822
Licence: Public Domain Mark
Credit: Notice of a large human calculus in the Library of Trinity College / by J. Cumming. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![Library of Trinity College. By the Rev. J. CUMMING, M.A. F.R.S. M.G.S. PROFESSOR OF CHEMISTRY IN THE UNIVERSITY OF CAMBRIDGE. [Read Nov. 26, 182L] In the Forty-Sixth Volume of the Philosophical Transactions an account is given of a remarkable Human Calculus in the pos- session of the Society of Trinity College.-—Its history, weight, and specific gravity are the only circumstances mentioned in this notice; for, being unsawn, no knowledge of its composition could then be obtained, even had the state of Chemistry at that time permitted it. As, in their internal conformation and in the ar- rangement of their strata, Calculi present varieties far more important than can be exhibited by their external properties, I re- quested permission to have this Calculus sawn asunder, which was done with such care and skill by Mr. Okes, that as a specimen it has received little if any injury. Its structure is such as, taken conjointly with its magnitude, to make it, perhaps, the most curious and instructive Calculus in this kingdom, since it presents the characters of not less than four distinct species. The nucleus is lithic, to .this succeeds a considerable portion of the oxalate of lime variety, this is followed by layers of the triple crystals,](https://iiif.wellcomecollection.org/image/b2241650x_0005.jp2/full/800%2C/0/default.jpg)
