The archives of physiological therapy . ii8 THE DENSITY OF CALCULI. Fig. 13-Calculus exposed in the kidney (photograph). instance, taken by the aid of the largediaphragm, which has a diameter of fiveinches, does not shovv^ as marked as itdid when enveloped by the renal sub-stance with the small diaphragm, whichhas a width of 2V2 inches only (). The same applies to Fig 15, whichillustrates an elliptical vesical calculus,consisting of three different layers; viz.,carbonate of magnesium as the outerlayer, the triphosphate as the main andinner layer, and calcium carbonate as asmall nucleus.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmedicine, bookyear190