Y. Henderson at 
For the experiments in which the subject remains in one place 
the spirometer is used; for those in which he walks about the 
Douglas bag (2) is employed. The three tables referred to are 
as follows. 
Table I.—¥For reduction to dry air at 0° and 760 mm. of mer- 
cury of 100 volumes of air saturated with moisture at different 
temperatures and pressures. ‘This is reproduced from page 55 
of Haldane’s Methods of Air Analysis (8). 
Table IJ.—¥or transforming apparent into true respiratory 
quotients. This is reproduced from page 57 of MHaldane’s 
Methods of Air Analysis. (The table includes one error; in the 
column of true respiratory quotients, 1.031 should be 1.131.) 
Table III.—For the heat value of 1 liter of oxygen consumed 
in the body at various respiratory quotients. This is taken from 
page 357 of Volume xii of this Journal (4). 
The directions are as follows. 
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