ZUNTZ-GEPPERT AND BENEDICT METHODS. 



131 



in sixth period. Average barometric pressure, 753.1 mm.; average tempera- 

 ture of air with spirometer unit, 24.3° C; with Zuntz-Geppert apparatus, 

 22.0° C. 



H. F. T., January 27, 1912. — Spirometer unit, 4 periods; Zuntz-Geppert 

 apparatus, 2 periods; periods with each apparatus in series. Subject lay on 

 side instead of on back as usual. He said that, in second period with Zuntz- 

 Geppert apparatus, inhalation seemed difficult and on examination it was 

 found that the membrane on the ingoing valve was dry. Pulse-rate for the 

 most part uniform. Respiration-rate uniform in all periods. Average 

 barometric pressure, 755.7 mm. ; average temperature of the air in the spi- 

 rometer unit, 20.8° C; in the Zuntz-Geppert apparatus, 17.8° C. 



H. F. T., January 29, 1912. — Zuntz-Geppert apparatus, 3 periods; spirom- 

 eter unit, 2 periods; periods with each apparatus in series. With the Zuntz- 

 Geppert apparatus the more recent form of Zuntz valves (see fig. 19, page 54) 

 and covering of fish membrane were used. With spirometer unit, the newer 

 form of moistener (see fig. 12, page 37) was employed. Mouthpiece used 

 with both apparatus. Subject lay on right side throughout experiment. In 

 second period with spirometer unit, subject said that his throat became 

 somewhat dry; the moistener was therefore moistened and in the second 

 period with this apparatus the subject said that the air seemed more agree- 

 able. Pulse-rate in individual periods for the most part uniform. In the 

 first period of the experiment the pneumograph was not properly adjusted, so 

 that a good record of the respiration was not obtained. In the second period 

 there were a number of apnceic respirations, this being even more marked 

 in the third period. In the last two periods of the experiment (with the 

 spirometer unit), respiration-rate uniform. Average barometric pressure, 

 766.1 mm.; average temperature of air in spirometer unit, 21.8° C; in Zuntz- 

 Geppert apparatus, 19.5° C. 



H. F. T., January 30, 1912. — Spirometer unit, 3 periods; Zuntz-Geppert 

 apparatus, 3 periods; periods with each apparatus in series. Subject lay on 



1| | ! 



Fig. 40. — Types of respiration of subject H. F. T. with the spirometer unit on January 30, 1912. 



Three-fifths original size. 



Upper curve, first period; lower curve, second period; time lines, minutes. 



