Renal diseases : a clinical guide to their diagnosis and treatment . ears as the process of resolution fact, first noticed by Dr. Eedtenbacher,was made the subject of an interesting paperin the Medico-Chirurgical Transactions of1852,2 by Dr. Lionel Beale, and has since beenconstantly recognized in clinical teaching in 1 Or tlie more recent French translation noticed at p. 249. 2 Vol. xxv. p. 325. THE URINE 259 PROPERTY. Thechlo-rides. cases of pneumonia. The practitioner shouldalways, in these cases, verify the fact for him-self, particularly watching the period of thereappearanc
Renal diseases : a clinical guide to their diagnosis and treatment . ears as the process of resolution fact, first noticed by Dr. Eedtenbacher,was made the subject of an interesting paperin the Medico-Chirurgical Transactions of1852,2 by Dr. Lionel Beale, and has since beenconstantly recognized in clinical teaching in 1 Or tlie more recent French translation noticed at p. 249. 2 Vol. xxv. p. 325. THE URINE 259 PROPERTY. Thechlo-rides. cases of pneumonia. The practitioner shouldalways, in these cases, verify the fact for him-self, particularly watching the period of thereappearance of the chloride as marking afavorable element in prognosis. The process for all ordinary purposes is asimple one. The urine to be examined shouldbe first acidulated with a drop or two of purenitric acid, and afterwards a few drops of asolution of nitrate of silver added. The chlo-ride of silver thrown down, which is insolublein nitric acid, is proof of the presence of thechlorides, and if no cloud be produced it isconcluded that the chlorides are absent. Fig. is Crystals of chloride of sodium. For all ordinary purposes this rough processsufficient. But Dr. Beale in his paper 260 THE URINE. PROPERTY. The pointed out a fallacy which might constantlychlo- occur from the presence of hydrochlorate ofrides, ammonia which is frequently present in theurine, and which would give to the nitrate ofsilver the same precipitate as if a fixed chlo-ride were present. He, therefore, evaporatesa given quantity of urine in a water bath todryness. The solid residue is incinerated byexposure to a dull red heat till thoroughlydecarbonized. Whatever fixed salts were leftwere dissolved in distilled water acidulatedwith nitric acid. The nitrate of silver solutionwould thus prove the presence or absence ofthe fixed chloride of sodium. In, the paperjust quoted Dr. Beale further showed that thechloride of sodium absent from the urine inthe acme of the inflammatory process wasstored up in the hepatiz
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