154 



eessation of the respiration, when it is turned on its back, the frog- 

 does not move, abnormal position of the 

 leg' is not corrected, cataract of both (he 

 eyes ^). 



At 1 o'clock placed in water. 

 IV2 o'clock. The frog shows now and 

 then a respiration. 



2 o'clock Chejne-Stokes' respirations. 

 Whilst the frog continues to lie on 

 its back in the bottle of wnler, the 

 number of respirations per group and 

 the duration of the pauses during some 

 liuie ai'e i-egistered. 



Heie follows the I'esult : 

 9 res})irations 58 sec. pause 



1 minute pause 14 respirations 



9 respirations 

 7j minute pause 



5 respirations 

 40 sec. [)ause 

 Jl respirations 

 70 sec. pause 

 11 respirations 

 This observation 



Fig 3. 



62 sec. pause 



1 1 respirations 



45 sec. pause 



13 res J )i rations 



40 sec. pause 



20 respirations 



62 sec. |iause 



las this advantage 



over the registration, because on account 

 of the sus|)ension the respiration of the 

 frog varies temporally at least often. 



After this the respiratory curves were 

 registered by suspension of the mouth- 

 bottom, as Langkndohff did for the first 

 time. The first 8 minutes after the 

 suspension the respiration stopped entirely. 

 Thereupon the groups reappeared again. 

 Fig. 3 represents some of these. The 

 bottom row was i-egistered 7^ hour, the 

 top one 10 minutes after the suspension. 



When we compare the respiratory - 

 curves of these groups with the curves 



1) In order to control the experiment the two lenses were extirpated after the 

 experiment and compared witli normal extirpated lenses. The latter were clear 

 and transparent, the lormer turhid and opalescent. 



