CONTENTS XI 



LAAR (J. J. VA n). On the course of the values of a and b for hydrogen at 



different temperatures and volunoes 750. II, 1195. 

 LEEUWEN (w. STORM VAN) and A. DE Kleyn. Concerning vestibular eye-reflexes 1. 



On the origin of caloric nystagmus. 622. 



— and C. DE LiND van Wijngaarden. On the effect of Lobelin on the rise of 

 blood pressure by Nicotin. 630. 



LIGHT (The brightness of the black body and the mechanical equivalent of). 1036. 

 LIGHT EMISSION (On the) of gases and mixtures of gases by electric discharges. 1043. 

 LIMITING SETS. (On linear inner). 1192. 



LIND VAN WIJNGAARDEN (C. D E). V. (WIJNGAARDEN C. DE LiND VAN). 



LINEAR CONGRUENCE of rays (Surfaces that may be represented in a plane by a). 419. 

 LOBELIN (On the effect of) on the rise of blood pressure bij Nicotin. 630. 



LOBRY DE BRÜIN (C A.). V. BrüYN (C. A. LoBBY DE). 



LOOK (c H R. van) and J. Böeseken. On the Hydrindene-1.2. diols. 1186. 

 LORENTz (h. a.). On Einstein's theory of gravitation. III. 2. IV. 20. 



— presents a paper of Mr. Th. de Donder : "Sur les equations differentielles du 

 champ gravifique". 97. 



— presents a paper of Dr. J. J. van LaaR: "On the critical temperature and 

 pressure of Mercury and Phosphorus". 138. 



— presents a paper of Mr. J. M. Burgers: "Adiabatic invariants of mechanical 

 systems". I. 149. II. 158. Ill 163. 



— presents a paper of Mr. J. M, Burgers: "The spectrum of a rotating molecule 

 according to the theory of quanta". 170. 



— presents a paper of Prof. P. Ehrenfest: "In what way does it become manifest 

 in the fundamental laws of physics that space has three dimensions" ? 200. 



— presents a paper of Dr. J. J. van Laar: "On the fundamental values of the 

 quantities b and l^ a for different elements, in connection with the periodic 

 system. V. 492. VI, 505. 



— presents a paper of Prof. P. Ehrenfest : "A paradox in the theory of the 

 Brownian movement". fiSO. 



— presents a paper of Dr. J. J. van Laar: "On the course of the values of a and i 

 for hydrogen at different temperatures and volumes". 750. II, 1195, 



^ — presents a paper of Dr. G. Nordstrom: "On the mass of a material system 

 according to the gravitation theory of Einstein", 1076. 



— presents a paper of Dr. G. Nordstrom: "On the energy of the gravitation field 

 in Einstein's theory". 1238. 



— presents a paper of Prof. W. J, de Haas : "On the diffraction phenomenon caused 

 by a great number of irregularly distributed apertures or opaque particles". 

 1278. 



macroscopic processes (The detiniteness of) and the kinetic theory. 1049. 



MADE (Miss J. E. M. VAN der) and H. R. Kruyt. Contributions to the theory of 



dyeing. 1st Communication, H36. 

 MADURESE (The auditory and visual cortex in the brains of two), 779. 

 MAGNETIC FIELD (On the influence of the temperature on the extinction ; further 



experiments upon the influence of the). 210. 



