KONINKLIJKE AKADEMIE VAN WETENSCHAPPEN 

 TE AMSTERDAM. 



PROCEEDINGS OF THE MEETING 

 of Saturday December 28, 1907. 



(Translated fioni : Verslag van de gewone vergadering der Wis- en Natuurkundige 

 Afdeeling van Zaterdag 28 December 1907, Dl. XVI). 



COlsTTE^sTTS. 



J. Scumutzer: "About the oblique extinction of rhombic crystals'". (Communicated l)y I'rof. 

 A. Wichmann), p. 368. 



S. J. DE L.4KGK: "On ascending de<!;eneration after partial section of the spinal cord". (^Com- 

 municated by Prof. C. Winklku), p. 386. (Witli 2 plates). 



0. PosTMA: "Motion of molecule-systems on which no external forces act". (Communicated 

 by Prof. H. A. Loukktz), p. 390. 



W. VoiGT : "On the permissible orders of the axes of symmetry in crystallography". (Com- 

 municated by Prof. H. A. Louentz), p. 408. 



IT. Kamkulingci Oisnes aTid C. Braak : "Isotherms of diatomic gases and their binary mixtures. 

 Vi. Isotherms of hydrogen between — 104° C. and — 217° C" (Continued), p. 413. (With one 

 plate). 



II. Ka.meuj.ingii Oxnes und C. Braak : "Isotherms of diatomic gases and their binary mixtures. 

 VII. Isotherms of hydrogen between 0° C. and 100° C", p. 419. 



II. Kamerlingii Onnes, C. Buaak and .T. Clay: "On the measurement of very low tempe- 

 ratures. XVII. Determinations for testing purposes with the hydrogen thermometer and the 

 resistance thermometer", p. 422. 



H. Kameri.ingii Onkk.s and C. Braak : "On the measurement of very low temperatures. 

 XVIII. The determination of tlie absolute zero according to the hydrogen thermometer of 

 constant volume and the reduction of the readings on the normal hydrogen thermometer to the 

 absolute scale", p. 429. 



J. SciiMCTZER: "On the terms Schalie, Lei and Schist". (Communicated by Prof. C. E. A. 

 Wicumakn), p. 432. 



F. M. Jaeger : "On the question as to the miscibiiity and the form-analogy in aromatic 

 Nir.ro- and Nitroso-compounds". (C!ommunicated by Prof. A. P. N. Franchimonï), p. 436. 



P. Zeeman : "Observations of the magnetic resolution of spectral lines by means of the metliod 

 of Fabry and Perot", p. 440. (With one jilate). 



II. Kamerlingh Onnes: "Isotherms of aaonatomic gases aud their binary mixtures. I. Iso- 

 therms of helium between -f- 100" C. and —217° C", p. 445. 



25 



Proceedings Royal Acad. Amsterdam. Vol. X. 



