File:Hand-book of physiology (1892) (14764909502).jpg

Identifier: handbookofphysio00bake (find matches)
Title: Hand-book of physiology
Year: 1892 (1890s)
Authors: Baker, W. Morrant, (William Morrant), 1839-1896 Harris, Vincent Dormer Kirkes, William Senhouse, 1823-1864. Hand-book of physiology. 13th ed
Subjects: Physiology Human physiology
Publisher: London : John Murray
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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writing lever; e, screw to regulateheight of b ; d, outside protective spring; g, screw to fix on the upright of the support. might be caused by the inertia of the mercury in the mercurialmanometer ; it also shows in more detail the variations of theblood pressure in the vessel during and after each ind: vddual beatof the heart. In fig. 178 is seen a tracing taken with Kicks Kymographfrom an artery of a dog. As regards the actual amount of blood pressure, from observa-tions which have been made by means of the mercurial mano-meter, it has been found that the pressure of blood in the carotidof a rabbit is capable of supporting a column of 2 to 3*5 inches(50 to 90 mm.) of mercury, in the dog 4 to 7 inches (100 to175 mm.), in the horse 5 to 8 inches (125 to 200 mm.), and inman the pressure is estimated to be about the same. P 2 CIRCULATION OF THE BLOOD. (CH. To measure the absolute amount of this pressure in any artery,it is necessary merely to multiply the area of its transverse section
Text Appearing After Image:
Fig. 177.—Ficks Kymograph, improved by Hering (after McKendrick). a,(hollow springrilled with alcohol, bearing lever arrangement b, d, c, to which is attached themarker e; the rod c passes downwards into the tube /, containing castor oil, whichoffers resistance to the oscillations of c; g, syringe for filling the leaden tube b withsaturated sulphate of sodium solution, and to apply sufficient pressure as to preventthe blood from passing into the tube h at i, the cannula inserted into the vessel;I, abscissa-marker, which can be applied to the moving surface by turning the screw m;Je, screw for adjusting the whole apparatus to the moving surface; o, screw forelevating or depressing by a rack and pinion movement the Kymograph ; n, screw foradjusting the position of the tube /. by the height of the column of mercury which is already knownto be supported by the blood-pressure in any part of the arterial

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