KONINKLIJKE AKADEMIE YAN WETENSCHAPPEN 

 ÏE AMSTERDAM. 



PROCEEDINGS OF THE MEETIKG 

 of Saturday March 25th i899. 



(Trenslatcd from: A'ersl.-ig van de gewone vergadering der Wis- en Natuurkundige 

 Afdecling van Zaterdag 25 Maart 1899 Dl. VII). 



Contexts : „Tlie effect produced upon respiration by faradic excitation of some nerve-tracts". 

 By Prof. C. Winkler and Mr. J. Wiardi Beckmah, p. 361 (With one plate). — „The 

 infiuence of salt-solutions on the volume of animal cells". (2nd Communication.) By 

 Dr. II. J. IlAMnDRGER, p. 371. — „An anomaly in the course of the plaitpointcurve in 

 a mixture of anomalous substance.s". By I'rof. J. D. tan der Waals, p. 385. — „On 

 variation of volume and of pressure" (III). By Prof. J. D. tak dek Waals, p. 390. — 

 „On the characteristic equation of v. D. Waals." By Prof. L.Boltzmaxn (communicated 

 by Prof. J. T). vak der Waals), p. 398. — „Tlie galvano-magnetic and thermo-mag- 

 netic phenomena in bismuth" (Snd Communication.) By Dr. E. van Everdingen Jr. 

 (communicated by Prof. H. Kamerlinoh Onxes), p. 404. — „On the velocity of elec- 

 trical reaction" (II). By Dr. Ernst Cohen (communicated by Prof H. W. Bakhuis 

 Eoozeboom), p, 417. — ^DiflVaction of Röntcen Rays". By Prof. H. IIaga and Dr. 

 C'. H. Wind, p. 4'iU (With 2 plates). — „Simplified Theory of electrical and optical 

 phenomena in movirg systems". By Prof. H. A. Lorextz, p. 427. — „Stokes's Theory 

 of abeiTation in the supposition of a variable density of the ether". By Prof. II. A. Lorentz, 

 p. 4't3. — „On reducible hyperelliptic Integrals". By Prof J. C. Kluyter, p. 448. 



The following' papers were read : 



Physiology. — " T/ie effect produced upon Respiration by faradic 

 excitation of some nerve-tracts'\ By C. \Yixkler and J. 

 Wiardi Beckman. 



In one of the previous meetings ') of the Academy, we made a 

 communication about the results of our experiments upon the chan- 

 ges of respiration, occasioned by faradic excitation of the cortex of 

 the frontal brain in dogs. We then demonstrated, that a defined spot 

 (our point 16)-) answers to that excitation by increasing the func- 



') C. WiNKLEE, Attention and respiration. Proceedings of the royal Academy of 

 Sciences. Amsterdam. Saturday, October 3t)th 1S9S. p. 121. 

 =) Ibidem, cf. Kg. XX— X.\:ni. 



25 



Proceedings Royal Acad. Amsterdam. Vol. I. 



