. Carnegie Institution of Washington publication. TECHNIQUE FOR METABOLISM DURING REST. 107 train of purifiers consisting of soda-lime bottle and small Williams bottle (see figs. 11 and 12). Thus both samples are taken at identically the same time. In figure 8 but one soda-lime and one small Williams bottle are shown. As a matter of fact, looking down on top of the tnble (figure 12) one sees four sets of absorbers. At the bottom of figure 12 is shown the set connected with blower Fi and at the top the set connected with blower F2. As each sampling can and blower is provided with a double set o
. Carnegie Institution of Washington publication. TECHNIQUE FOR METABOLISM DURING REST. 107 train of purifiers consisting of soda-lime bottle and small Williams bottle (see figs. 11 and 12). Thus both samples are taken at identically the same time. In figure 8 but one soda-lime and one small Williams bottle are shown. As a matter of fact, looking down on top of the tnble (figure 12) one sees four sets of absorbers. At the bottom of figure 12 is shown the set connected with blower Fi and at the top the set connected with blower F2. As each sampling can and blower is provided with a double set of soda-lime and Williams bottles, we have two series for blower Fi withdrawing air from can Ci and two series connected with blower F2 withdrawing air from can C2. With this arrangement we can, by- means of valves Vi and V2 (fig. 12) and their corresponding valves. Fig. 11.—Top view of lower shelf of absorption apparatus of group respiration chamber. The parts are lettered the same as in fig. 8. hi and /12, globe valves for by-passing air-currents from blowers, Fi and F2. wii and mj, rubber tubes for fine regulation of amounts of air delivered by blowers. These tubes are opened and closed by telegraph sounders actuated by contacts di and dj in fig. 13. F3 and V4, deflect both air-currents from one series of purifiers to the other at the end of any 20 or 30-minute period and thus begin an- other experimental period without intermission. This method of treatment assumes at the start that the same amount of air will be discharged through both 10-mm. openings in the bottoms of cans Ci and C2. Since the discharge from the rotary air-impeller, a, is somewhat nearer to the opening of the bottom of the can Ci than it is to the opening in C2, one might think that there would possibly be more or less of a short-circuiting effect between the discharge of a and the opening B, and inequality in discharge to Ci and C2. This difficulty is avoided by a series of wire screens (W, fig. 9) whic
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