﻿232 



20 



As regards the germination the 3 portions showed no ditference. 



VII. 3 "common-legume" portions were soalved and put aside tor 5 days in 

 order to germinate (March 4th— 9th). During the first day and night the second 

 and the third portions received doses of ether, during the last 4 days they received 

 no ether. The following results were observed: 



This experiment, which is a continuation of VI, the arrangement being the 

 same excepting the doses being much larger, shows a retardation of the respira- 

 tion still greater than that of VI during the narcosis as well as during the time 

 after this. The peas of 3 were covered with a white layer of micro-organismes, 

 which evidently contributed to the production of CO, . After the two days the 

 peas had germinated in 1; the germination was slightly retarded in 2. and had 

 only just begun in 3. 



The observations of the different temperatures of these experiments are very 

 imperfect; still they intimate that rise in temperature accelerates the effect of ether; 

 a conclusion which agrees with those of Claude Bernard (cfr. p. 3). 



F'urthermore these experiments demonstrate as follows; 



1) Small doses of ether used for short periods accelerate the CO^-production, 

 a phenomenon which may be observed especially at low temperatures. 



2) Large doses of ether retard the C'O^-production. 



3) During the after-etfect of the ether an acceleration of the respiratory pro- 

 cess') is never noted as Johannsen has found in all his experiments on ripening 

 sweet-peas and lupines. 



4) Etherization of germinating seeds retards the germination and the growth, 

 a result which has been demonstrated by several students already mentioned. 

 Having used somewhat long durations of exposure I have never noted an accelera- 

 tion of the growth nor of the germination. 



') Uetmer, experimenting with the effect of chloroforin on seedlings of Pisuni has likewise demon- 

 strated n great retardation of the respiration during the after-effect [Detiner, 1882, p. 213 ff.]. 



