Transactions . abatier,{Med. Operatoire, tom iii., p. 136,) observes that the Celsianmethod is preferable to all others when the stone, havnng lodgedat the neck of the bladder, has gone on increasing so as to extendinto the urethra and become prominent in the perinseum; andDionis, [Operations de Chirurgie, par La Faye, p. 221,) previouslymade the very same remark.^^ This being an unusual case, not only fiom the fact of so largea calculus lodged and increasing in the prostatic urethra havingbeen removed by operation, but from the mechanical structure andchemical nature of the calculus itself, I
Transactions . abatier,{Med. Operatoire, tom iii., p. 136,) observes that the Celsianmethod is preferable to all others when the stone, havnng lodgedat the neck of the bladder, has gone on increasing so as to extendinto the urethra and become prominent in the perinseum; andDionis, [Operations de Chirurgie, par La Faye, p. 221,) previouslymade the very same remark.^^ This being an unusual case, not only fiom the fact of so largea calculus lodged and increasing in the prostatic urethra havingbeen removed by operation, but from the mechanical structure andchemical nature of the calculus itself, I wrote to Mr. Crosse con-cerning it, and forwarded the calculi for his examination. To thatgentleman and his son I am indebted for having put together theseveral pieces, so as to build up the calculus as it existed in theurethra, and from which a few casts have been prepared byMr. Charles Goodwin, of Norwich.* * Possessed of the mould I shall be happy to prepare a cast for any gentlemanwho may wish to have REMOVED BY PERIN.^AL INCISION. 241 The entire stone is four inches and seven-eighths in length, andconsiderably larger at one end than at the other. The largerextremity had been situated posteriorly in the prostatic part of theurethra. Around the broadest part it measures four inches andfive-eighths, from which it tapers to the other extremity, where itmeasui-es one inch and five-eighths in circumference. Midwaybetween the two ends it measures three inches and a half. It isrounded and convex on the lower surface, or that which wasnearest to the peringeum, which is the aspect respreseuted in theplate; and the opposite surface is somewhat flattened and presents two curves,—a larger one, the concavity of which is inthe centre of the upper sm-face of the stone, and apparentlycorresponding with the curved shape of the posterior part of theurethra, and a smaller one in the opposite direction, near theanterior extremity. The surface is intersected with numerousang
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