. Carnegie Institution of Washington publication. BENEDICT APPARATUS, INCREASED DEAD SPACE. 213 distressed him, but otherwise he was perfectly comfortable. Pulse-rate very uniform in all of the periods. Respiration uniform in all periods, both as to rate and character. Average barometric pressure, mm.; average tempera- ture of air in apparatus, ° C. STATISTICS OF EXPERIMENTS WITH INCREASE IN DEAD SPACE OF 224 J. K. M., December 3, 1912.—Without dead space, 3 periods; with dead space, 3 periods; periods with and without additional dead space alternating. New form of glass nosepie
. Carnegie Institution of Washington publication. BENEDICT APPARATUS, INCREASED DEAD SPACE. 213 distressed him, but otherwise he was perfectly comfortable. Pulse-rate very uniform in all of the periods. Respiration uniform in all periods, both as to rate and character. Average barometric pressure, mm.; average tempera- ture of air in apparatus, ° C. STATISTICS OF EXPERIMENTS WITH INCREASE IN DEAD SPACE OF 224 J. K. M., December 3, 1912.—Without dead space, 3 periods; with dead space, 3 periods; periods with and without additional dead space alternating. New form of glass nosepieces used in normal periods; pneumatic nosepieces in periods with additional dead space. Subject very drowsy in normal periods. Pulse-rate somewhat variable in first four periods; uniform in last two periods. Respiration uniform in all periods, especially in the periods with the increased dead space. Average barometric pressure, mm.; average temperature of air in apparatus, ° C. J. B. T., December 7,1912.—Without dead space, 3 periods; with dead space, 3 periods; periods with and without additional dead space alternating. Pneu- matic nosepieces used. Pulse-rate in first, second, third, and sixth periods uniform; in fourth period varied from 71 to 78; in fifth period, from 74 to 85. Respiration very uniform in all periods, but subject said he had difficulty in breathing throughout the first period and again in the middle of the last period. Sections of the respiration curves are given in figures 70 and 71. Average barometric pressure mm.; average temperature of air in apparatus ° FIG. 71.—Type of respiration of subject J. B. T. without additional dead space on December 7, 1912. Original size. DISCUSSION OF RESULTS. The results of the comparison experiments with and without addi- tional dead space in the spirometer unit are given in table 39. A study of these results shows but little, if any, difference in the two types of breathing with an additio
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