CONTENTS V 



Kees OM (W. H.) and J. üe smedt. On the diffraction of Röntéen-rays in 

 liquids. 118. 



Kleun (A. de) and R. Magnus. A further contribution concerning the function 

 of the otolithic apparatus. 256. 



Kolkmeijer (N. H.). The crystal structure of germanium. 125. 



KnausEL (R.). Ueber einen fossilen Baumstamm von Bolang (Java), ein 

 Beitrag zur Kenntnis der fossilen Flora Niederlandisch-Indiens. 9. 



Kruijt (H. R.) and C. P". van Duin. Heterogeneous catalysis and the orient- 

 ation of adsorbed molecules. 324. 



K u E N E N (J. P.). The magneto-thermic effect according to thermodynamics. 384. 



KiiHR (C. A. H. VON Wolzogen). On the occurrence of sulphate- 

 reduction in the deeper layers of the earth. 188. 



Laar (J. .J. van). On the heat of mixing of normal and associating liquids. 

 309. 399. 



Landsteiner (K.). Experiments on anaphylaxis with azoproteins. 34. 



Lead (Measurements concerning the electric resistance of ordinary) and 

 of uranium lead below 14° K. 451. 



Leukocytes (On the causes of the emigration of). 36. 



Light path (On the) in the general theory of relativity. 288. 



Liquids (On the diffraction of Röntgen-rays in). 118. 



— (On the heat of mixing of normal and associating). 309. 399. 

 Lithium (Research by means of Röntgen-rays on the structure of the crystals 



of) and some of its compounds with light elements. IL Lithium-hydride. 27. 

 Lorentz (H. A.). On Whittaker's quantum mechanism in the atom. 414. 

 Luminescence (On centres of) and variations of the gas pressure in spec- 

 trum tubes at electrical discharges. II. 463. 

 Magnus (R.) and A. de Kleijn. A further contribution concerning the 



function of the otolithic apparatus. 256. 

 Mannitol (Cyclic derivatives of). 335. 



Milk (Changes in) due to sterile inflammation of the udder. 275. 

 MoL (W. E. de). The disappearance of the diploid and triploid magnico- 



ronate narcissi from the larger cultures and the appearance in their 



place of tetraploid forms. 216. 

 Molecules (Heterogeneous catalysis and the orientation of adsorbed). 324. 

 Moluccas (Cuba, the Antilles and the Southern). 263. 

 Monochloro-trinitrobenzenes. 223. 



Morphology (On the) of the testis of Rana fusca Rösel. 99. 

 Narcissi (The disappearance of the diploid and triploid magnicoronate) 



from the larger cultures and the appearance in their place of tetraploid 



forms. 216. 

 Neon and argon (On the mean free path of slow electrons in). 90. 



— (On the excitation and ionization potentials of). 179. Appendix. 442. 



