File:A text-book of physiology - for medical students and physicians (1916) (14583705309).jpg

Identifier: textbookofphysio1916howe (find matches)
Title: A text-book of physiology : for medical students and physicians
Year: 1916 (1910s)
Authors: Howell, William H. (William Henry), 1860-1945
Subjects: Physiology Medicine
Publisher: Philadelphia and London : W. B. Saunders Company
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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, in a burette filled with mercury and inverted over the opening fromF contained in the bottom of C. In performing an experiment the flaskB, which is to contain the blood, is connected with F, as shown in the figure,all joints being protected from leakage by a seal of water outside, as shownat h, which represents a piece of wide rubber tubing filled with water so asto protect a joint between two pieces of glass tubing. B is next exhaustedcompletely by raising and lowering M a number of times hi the way describedabove until on throwing B into communication with a vacuum in F no further 670 PHYSIOLOGY OF RESPIRATION. gas is given off. The last particles of air may be driven out from B by boil-ing a little water in it. After a complete vacuum has been established in Ba measured amount of blood is introduced from a graduated syringe, S, asrepresented in the figure. This blood must be taken directly from the vesselsof the animal and be introduced into B at once. B is kept immersed in water
Text Appearing After Image:
Fig. 272.—Gas pump for extracting the gases of blood (Grehant): M and F, Mercuryreceivers; P, windlass for raising and lowering M; m, a three-way stop-cock protected by aseal of mercury or water; C, a cup with mercury over which the receiving eudiometer isplaced to collect the gases; B, the bulb in which, after a vacuum is made, the blood is intro-duced by the graduated syringe, S. By means of the stop-cock m the vacuum in F, caused bythe fall of the mercury, can be placed in communication with B. After the gases have diffusedover into F, M is raised, and when the stop-cock m is properly turned these gases are drivenout through C into the receiving tube. The operation is repeated until no more gas is givenoff from B. at the temperature of the body, and the bulb M is now raised and lowered anumber of times so that the gases given off from the blood are drawn overinto F and then by proper manipulation of the stop-cock are driven intoa burette fastened over the opening of the tube in C

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