File:A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine (1885) (14594599209).jpg

Identifier: manualofhumanphy01land (find matches)
Title: A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine
Year: 1885 (1880s)
Authors: Landois, L. (Leonard), 1837-1902 Stirling, William, 1851-1932
Subjects: Physiology Histology
Publisher: Philadelphia, P. Blakiston, Son, and Company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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ng is a description of Gowers instrument (Fig. 3):—TheHcemacytometer consists of—(1.) A small pipette, which, when filled to themark on its stem, holds exactly 995 cubic millimetres. It is furnished withan India-rubber tube and mouthpiece to facilitate filling and emptying. (2.) Acapillary tube marked to contain exactly 5 cubic millimetres, with India-rubbertube for filling, &c. (3.) A small glass jar in which the dilution is made. (4.) Aglass stirrer for mixing the blood and solution in the glass jar. (5.) A brass stageplate, carrying a glass slip, on which is a cell, -J- of a millimetre deep. The bottomof this is divided into -^ millimetre squares. Upon the top of the cell rests thecover glass, which is kept in its place by the pressure of two springs proceedingfrom the ends of the stage plate. The diluting solution used is a solution of sodic sulphate in distilled water,S. G. 1,025, or the following—sodic sulphate, 104 grains; acetic acid, 1 drachm;distilled water, 4 ozs.
Text Appearing After Image:
Fig. 3. Gowers apparatus, made by Hawksley, London. A, Pipette for measuring thediluting solution. B, Capillary tube for measuring the blood. C, Cell withdivisions on the floor, mounted on a slide, to which springs are fixed to securethe cover glass. I). Vessel in which the solution is made. E, Spud formixing the blood and solution. F, Guarded spear-pointed needle. 995 cubic millimetres of the solution are placed in the mixing jar; 5 cubicmillimetres of blood are drawn into the capillary tube from a puncture in the HISTOLOGY OP THE RED BLOOD-CORPUSCLES. 7 finger, and then blown into the solution. The two fluids are well mixed byrotating the stirrer between the thumb and finger, and a small drop of this dilutionis placed in the centre of the cell, the covering glass gently put upon the cell, andsecured by the two springs, and the plate placed upon the stage of the microscope.The lens is then focussed for the squares. lu a few minutes the corpuscles havesunk to the bottom of the cell, a

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