File:American journal of physiology (1898) (14779088201).jpg

Identifier: americanjourna28ameruoft (find matches)
Title: American journal of physiology
Year: 1898 (1890s)
Authors: American Physiological Society (1887- ) American Physiological Society (1887- ). Abstracts of papers presented at the fall meeting American Physiological Society (1887- ). Proceedings
Subjects: Physiology Physiology
Publisher: (Bethesda, Md., etc.) American Physiological Society (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
m.) the chamber was too large. Hencea much smaller apparatus was subsequently constructed, in which anumber of important changes were made as a result of our experiencewith the first chamber. The respiration chamber finally employed has a dimension of ap-proximately 60 cm. on each side. It is constructed of galvanizedsheet iron, all of the seams being well reinforced and soldered so as tobe air-tight. The general structure of the apparatus and accessoriesis shown in Fig. i. The top, which is removable, is provided with a ^ Laulanie (Loc, cit.) reports a brilliant scries of analyses carried out by meansof a eudiometer, described by him in Archives de physiologic, 1S94, (5), vi, p. 739. A Respiration Apparatus. 2>Z flange which can be lowered into a water seal. This water seal is pro-vided by a small trough, H, H, soldered firmly to the upper part ofthe sides of the chamber. When the cover is in place, if sufficientwater is poured into this trough, a perfect closure is secured. While
Text Appearing After Image:
oil is theoretically better than water for such a seal, it has the disad-vantage of being very dirty and liable to become distributed all overthe apparatus. No valid objection can be raised to the use of wateras a seal in this apparatus, since the determination of the water vapor-ized by the dog was not attempted; furthermore, the possibility of theabsorption of carbon dioxide by the small surface of water exposed isso slight that it cannot seriously affect the results. A glass window,W, i6 cm. square, is inserted tightly in the centre of the top,^ thusgiving an opportunity for the direct observation of the dog below. ® In the figure this is shown for convenience on the side of the chamber ratherthan on the top. 34 Francis G. Benedict and John Homans. On one side of the apparatus is attached a vertical sheet iron pipe,A, 22 cm. in diameter, in which is placed an electric fan. This pipe,which is connected with the chamber at the bottom, is carried acrossthe floor so that the opening iamericanjourna28ameruoft

Note About Images