( 645 ) 
is to be had, we may hold the N. laryng. sup. answerable for the 
usual action of the method, as it will most likely never be applied 
except for experiments on animals, when complete closure of the 
air passages has brought about cessation of respiraton. For it is 
exactly the experimental closure which modifies the usual type of 
respiratiou greatly, and which introduces unknown factors in the 
mechanism of respiration. 
It is quite a different thing for the N. glossopharyngeus and the 
ram. ling. N.V. They must necessarily be stimulated by every 
traction of the tongue. The N. glossopharyngeus appears to have 
an exceedingly strong effect on the inspiration, an arrest with strong 
stimulations, an acceleration with weaker stimulations. As well according 
to the investigations of KNoLL of 1883, as to my investigations in 
Prof. WiINKLER's laboratory, and to LABORDE's vague allusion, the 9th 
nerve of the brain has this strong reflex-action. It is therefore not 
very rational, not to look first of all to this nerve, in trying to find 
the explanation of the respiratory mechanism in LABORDE’s method. 
The excitation of the N. trigeminus may also produce inspiratory 
effects under the experimental conditions introduced by KNOLL 
(unknown to me); a pure chloroformnarcosis however, cannot have 
any or but a very small effect. 
Chemistry. — ‘“Kchinopsine, a new crystalline vegetable base”. 
By Dr. M. Gresnorr (Communicated by Prof. A. P. N, 
FRANCHIMONT). 
(Will be published in the Proceedings of the next meeting). 
Chemics. — „Zhe constitution of the Vapour-phase in the System 
Water-Phenol, with one or two Liquid-phases.” By Dr. F. 
A. H. SCHREINEMAKERS (Communicated by Prof. J. M. van 
BEMMELEN. 
(Will be published in the Proceedings of the next meeting.) 
(June 20, 1900.) 
