Abstract
<h3>Coloring Matters of the Urine in Microscopic Examinations.</h3> —Dr. C. Méhn. (<i>Annales des Maladies des Organes Génito-Urinaires</i>.) Some five years ago Dr. Méhn suggested the use of a saturated solution of ammonium sulphate to precipitate urobiline and other biliary pigments from slightly acid solutions by which process he readily separated the pathological coloring matters of the urine, also extracting the fatty matters from the so-called chylous urine. The present article treats of a method of re-dissolving these substances to facilitate the examination of urinary sediments. For this purpose he uses the ordinary sodium phosphate of pharmacy, in a cold saturated solution, which dissolves readily the ordinary bile pigments which can anew be precipitated by the ammonium sulphate. To relieve the anatomical elements of the pigment which obscures them, a few drops of this solution added cold, in a few moments re-dissolves the pigment and the urates so as to allow
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