( 707 ) 



between (lisiiitet'liji<i' power and de^i^ree of dissociation ^), rornierly 

 studied hy Paul and KnciNKi. Antitoxic actions of metal on metal 

 witli animal cells as reagent, studied by Lokh, })i-oved however that 

 the explauation cannot always be sought in this direction"). So a 

 deeper interj)retation of the case here mentioned must be put otf for 

 the present, the more as, very likely, it will appear not to belong- 

 to the domain of physiology but of chemistry. 



The observations may be completed with the results of some ex- 

 periments with other compounds. 



The toxicity of chinine hydrochloride for potato and for sugar- 

 beetroot is as clearl}' as by NaCl diminished by KKr, Li Br, Ca(N03)2, 

 which are rather diiferent salts. Glucose and saccharose, on the 

 otlier hand, have no influence whatever. 



Also of another organic poison, namely oxalic acid, the action 

 proved to be })artially neutralised by Na(M being also present in 

 the solution. Especially the sugar-beetroot gave very distinct i-esults 

 here, although also with the i)otato the antitoxic intluence of the 

 salt was clear. In a less degree, but yet in an unmistakable manner, 

 the toxicity of oxalic acid is counteracted by saccharose. 



Some experiments with a metallic poison (cupric salts) gave results 

 which were in general concordant with tliose of IvAnr^ENBKRG and 

 his collaborators. 



Physiology. — ''On some applicatiotis of the sfr/'/u/ ffdlranoineter". 

 By Prof. W. Eintuoven. Communication from the Physiological 

 laboratory at ]je}dcn. 



In a former paper '') the amount of sensitiveness of the string 

 galvanometer and the time in which tiie deflections of the quartz- 

 thread are accomplished were mentioned and illustrated by a few 

 photograms. We stated that with a feeble tension of the wire a 

 current of H)~^~ Amp. could still be observed and that with a 

 strongei- tension, so that the movement of the wire is still dead-beat 

 and the sensitiveness is reduced to a deflection of i nnn. for 

 2X10 8 Amp., a deflection of 20 mm. requires about 0.009 seconds. 



1) Zeitschr. i'iir physikal. Clicmie. Bd. 1^. 18ü(i. Zeilsclir. fur Hygiene. Bd. 25. 1897. 



2) Pflüger's Archiv. Bd. 88. VM)]. Ameiic. .Jouni. of physiol. vol. (5. 1902 

 Other observations belonging to the same category of animal pliysiology, were 



recently made by E. Lesné and Ch. Puchet fils, (Arch, internat, de Pharmacody- 

 namic. Xll. 1903). 



•5) Tliese Proc. June 27. 1903. p. 107. 



47 

 Proceedings Royal Acad. Amsterdam. Vol. Y!. 



