This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ... that such examinations of the faeces are required. Haemin Crystal Test (Teichman).--Prepare a solution of 0.1 gram each of KI, KBr, and KCL in 100 c.c. of acetic acid. This is a stable solution. Mix some of the material with a few drops of the solution on a slide, apply a cover-glass and warm the material until bubbles begin to appear (gentle steaming), then examine for dark-brown crystals. Blood in the Urine.--The most rapid method of detection is by using the microspectroscope. An ordinary hand spectroscope will answer however. Donogany's test is very satisfactory. To 10 c.c. of urine add 1 c.c. ammonium sulphide solution and 1 c.c. of pyridin. The urine will assume a more or less deep orange color according to its blood content. The spectrum of alkaline methaemoglobin or haemochromogen will be obtained. See illustrations under urine. In making the guaiac or other tests it is a good plan to repeatedly filter the bloodcontaining urine through the filter. Then touch a spot on the moist filter with the guaiac or benzidin solution and then finally drop on this so treated spot a drop or two of hydrogen peroxide solution. Blood in Faeces or Gastric Contents.--Take 5 grams of faeces and rub it up thoroughly in a mortar with 15 c.c. of a mixture of equal parts of alcohol, glacial acetic acid and ether. Filter through an unmoistened pleated filter paper repeatedly until only 3 to 4 c.c. remain of the filtrate. The faeces filtrate can be first tested chemically by depositing a few drops in the center of 3 or 4 circles of white filter-paper placed in a Petri dish or upon an ordinary white plate. The moistened spot is then treated with a few drops of a freshly prepared alcoholic solution of guaiac resin (about J gram of guaiac resin is broken up into small fragments...
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