A treatise on the formation, constituents, and extraction of the urinary calculus. Being the essay for which the Jacksonian prize for the year 1833 was awarded by the Royal College of Surgeons in London / by John Green Crosse.

  • Cross, John, 1790-1850.
Date:
1841
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the formation, constituents, and extraction of the urinary calculus. Being the essay for which the Jacksonian prize for the year 1833 was awarded by the Royal College of Surgeons in London / by John Green Crosse. Source: Wellcome Collection.

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    of a spirit-lamp has been applied, which distinguishes it from oxalate of lime, upon which dilute nitric acid produces no effervescence, until by heat the chemical changes just described have taken place. The correction of one error of a writer of high authority is nearly equal to the statement of a new fact, which is my reason for offering these brief remarks upon a simple test for oxalate of lime, Dr. Marcet5 having stated that when a portion of this concretion is submitted to a gentle heat, the oxalic acid is driven off and pure lime left; but this change will not happen, unless an intense heat be applied, the flame of a spirit-lamp, urged by the common blow-pipe, producing only the changes I have described, and leaving carbonate of lime. 5 Marcet's Essay on Calculous Disorders, 1817, p. 121. Brugnatelli gives correctly the analysis: “ I calcoli di ossalato di calce facilmente si riconoscono spingendoli al’ fuoco entro un crogiuolo; la decomposizione dell’ acido da origine a dell’ ossicarbonico, il quale si combina alia calce; si ha quindiun residuo che fa eflervescenza cogli acidi, o che, si il calore fu intenso, si scioglie nell’ acqua, ed essa acquista i carratteri dell’ acqua di calce.” Litologia Umuna, p. 29. 0