ZUNTZ-GEPPERT AND BENEDICT METHODS. 



133 



H. H. A., February 10, 1912. Spirometer unit, 3 periods; Zuntz-Geppert 

 apparatus, 2 periods; periods with each apparatus in series. Pulse-rate 

 uniform. Respiration uniform in all periods, both in rate and in amount. 

 Average barometric pressure, 758.7 mm.; average temperature of air in spi- 

 rometer unit, 19.0 C.; in Zuntz-Geppert apparatus, 17.5 C. 



P. F. J., February 5, 1912. Spirometer unit, 4 periods; Zuntz-Geppert 

 apparatus, 3 periods; periods with each apparatus in series. Subject stated 

 that in third period with spirometer unit he found it difficult to breathe, 

 especially in inhaling. Respiration-rate uniform in all the periods. Average 

 barometric pressure, 753.5 mm.; average temperature of air in spirometer 

 unit, 20.3 C.; in Zuntz-Geppert apparatus, 18.3 C. 



P. F. J., February 7, 1912. Zuntz-Geppert apparatus, 4 periods; spirometer 

 unit, 4 periods; periods with each apparatus in series. Subject said it was 

 difficult to state which of the two apparatus was the easier, the difference being 

 with the nosepieces and mouthpiece rather than with the apparatus. So far as 

 resistance was concerned, he noted no difference between the two. Respira- 

 tion uniform, except that in third period with spirometer unit there was a slight 

 tendency toward the end for it to be shallow and more rapid. Sections of the 

 kymograph records, showing the types of respiration, are given in figure 41. 

 Average barometric pressure, 760.0 mm.; average temperature of air in spi- 

 rometer unit, 22.7 C.; in Zuntz-Geppert apparatus, 19.4 C. 



FIG. 41. Types of respiration of subject P. F. J. with the spirometer unit on February 7, 1912. 



Three-fifths original size. 

 Upper curve, seventh period; lower curve, eighth period; time lines, minutes. 



J. E. F., February 12, 1912. Spirometer unit, 4 periods; Zuntz-Geppert 

 apparatus, 2 periods ; periods with each apparatus in 

 series. Pulse-rate varied somewhat in the different 

 periods. Respiration-rate uniform so far as the indi- 

 vidual periods were concerned. Average barometric 

 pressure, 762.8 mm.; average temperature of air in 

 spirometer unit, 19.4 C. ; in Zuntz-Geppert apparatus, 

 18.9 C. The preliminary ventilation by minutes pre- 

 ceding the two periods with the Zuntz-Geppert appa- 

 ratus is shown herewith. 



H. W. E., February 14, 1912. Spirometer unit, 3 



periods; Zuntz-Geppert apparatus, 2 periods; periods with each apparatus in 

 series. Pulse-rate in individual periods uniform. With spirometer unit, res- 



