(132) 



pneunjograpL of Marey. The descending line represents the inspira- 

 tion, the ascending line the expiration in every curve which has 

 been obtained in that way. The arrangement of the experiment is 

 the same as before. 



During the sum, the respiration becomes quicker and more super- 

 ficial, after the sum slower and more extensive (fig. YIII- — XIII). 



The first expiration can be lengthened, but it x'eaches rarely 

 the height of the preceding expirations. The shorter duration of 

 the next respirations, however, is principally dependent on the 

 shorter duration of the expiration ^), while the lengthening of the 

 expiration after the sum is characteristic (fig. IX and X). It exists 

 even then, when the duration of the respiration is little or not 

 lengthened, because a slight shortening of the inspiration continues 

 after the sum. 



A tendency to deep inspiration with limitation and specially 

 shortening of the expirations is characteristic of what happens during 

 the sum. Not with everybody, though. Sometimes the deeper inspi- 



1) The counting fig. 8, 9, 10 shows this clearly: 



Before 

 tl)e sum. 



"■t I a I 

 &E it'. 



1.3sec.j2.5sec. 

 1.4 w 2.6 



1.3 ti 

 1.3 // 



3. , 



3.2 // 



Ou an average 

 l.Ssec. 2.8sec. 



Pig. 9. 



Duriug 



the sura. 



g-O ^ » I 



P o 

 6sec. 



1 » 



5-t= 

 1 . 9sec. 

 2.2 // 



1.8 , 



1.9 // 

 1.9 // 

 2.2 , 



On an average 

 1 . sec. -2 . sec. 



After 

 the sum. 



P o 

 l.lsec. 



1.2 // 



1.3 , 

 1.3 // 

 1.5 w 

 1.2 , 



p o^ 

 3.8sec 



3.6 , 



3.3 // 

 3.6 , 



3.4 „ 

 3.9 // 



Ou an average 

 1 . 3scc. 3 . 6sec. 



Before 

 the sum. 



2 . 4sec. 

 2.4 » 



I . 2sec 

 0.9 , 

 l.l , 

 1.1 // 12.5 ,1 

 1.1 // 



C o 



Fig. 10. 



On an average 



1. sec. 2 4sec. 



