88 STORRS AGRICULTURAL EXPERIMENT STATION. 
present account is taken from that report by arrangement with 
the Department. Since the Bulletins of the Department are 
distributed among institutions and to persons interested in the 
details of such inquiries it will suffice here to give a condensed 
statement of the more important facts. . 
APPARATUS. 
The apparatus consists essentially of a respiration chamber 
in which the subject stays during the experiment, and, with 
this, appliances for maintaining a current of air through the 
respiration chamber and for measuring and analyzing this ven- 
tilating current of air. ‘There are also appliances for measuring 
the heat given off from the body. 
The general arrangement will be made clear by the outline 
sketch on the opposite page. ‘This shows the relations of the 
several parts, although numerous details of apparatus and 
machinery are omitted, and the parts are not drawn to scale 
nor are they shown in exactly the relative positions in which 
they were actually placed. 
So far as concerns the experiments herewith reported, which 
are of the nature of the common respiration experiments, the 
apparatus may be considered as a modification of the well 
known Pettenkofer apparatus. The general principle is the 
same. ‘The arrangements for maintaining the current of air 
and for measuring its volume and analyzing portions are, how- 
ever, quite different from those which have been commonly 
used with the Pettenkofer apparatus. 
REHSPIRATION CHAMBER. 
This is a room or box in which a man may live comfortably 
during the period of an experiment. ‘The inside dimensions 
are: length, 2.15 m. (7 ft.), width, 1.22 mo (4 dt) 
1.92 m. (6 ft. 4 in.). It is provided with conveniences for 
sitting, sleeping, eating, and working, as well as arrangements 
for ventilation and for the study of the respiratory products. 
The chamber consists, in fact, of three concentric boxes, the 
inner one of metal and the two outer ones of wood. ‘he 
inside volume is approximately 4.7 cubic meters. An opening 
in the front end of the metal chamber, 70 cm. high and 49 cm. 
wide (27% x 19% in.), serves both the purpose of a window 
and that of a door for entrance and exit. : 




