SPECIMEN OF A RHINOLITH.

BY E. J. M ' W E E N E Y , M.D., M.Cm, M.A.O., R.U.I .

[Read in the Section of Pathology, March 22, 1889.]

Report on Rhinolith, by DR. FALKI~ER.

In order to preserve the shape of this curious calculus I per- formed the whole analysis on 100 cgs. (about 15 grains), which I scraped off with a sharp knife.

The structure of the ca]culus was stratified, layers of ftark and light colour around a cavity, which had most probably at one time contained the nucleus of the growth.

The powder examined microscopicMly was amorphous or in indefinite crystaIs.

I examined incidentally for u¡ acid, oxalic acid, or carbonic acid, but found no trace of them.

My analysis is nearly identical with one made by Romer, who f o u n d

90 per cent. Ca3P~O s. 5 per cent. CaCO 3. 5 per cent. organic material.

The calculus analysed by me was a cast of the position which it occupied in the nasal fossa, and I am glad to say I have been able to preserve its forro consistently with an accurate analysis :---

100 centigrammes contain-- Moisture . . . . 3"2 cg. Organic matter - - - 13"0 ,~ Lime (CaO) - - - 44"4 ~, Phosphoric anhydride (P~Os)

Traces of chlorine, sodium, and magnesium. 38"4 ,,

~~n, ,~mlw~mmum ~ ~ w w ~ m - ~ m

99"0 cg.

346 SpecŸ of a Rhinolith.

Supplemental Report by DR. M~WEE~~~.

The only mention of a rhinolith, or nasal calculus, to be found on reference to the indexes to the ~' Proceedings of the Pathological Society of London," is in u XXXV. , 1884.

The exhibitor of the specimen in question is Mr. H. H. Clutton, and the stone is much smaUer than that now shown~ for it weighed only 65 grains, whereas the latter weighs 105. The results of the chemical analysis were precisely similar in both cases. Other curious resemblances between the two specimens are furnished by the facts that both h a d a central cavity, and that the patient was in both cases a young woman; the clinical symptoms were also the same--in fact, the only difference is that Mr. Clutton's speci- men did not presenta laminated appearance on section~ whereas th�91 now shown is most distinctly laminated.