X CONTENTS. 



LAAR (J. J. VA n). Some remarks on the last observations of Prof. H. Kamerlingu 



Onnes and Dr. W. H. Keesom. 238. 

 LACTIC ACID fermentation (On) in milk, 17. 

 LANGE (s. J. D e). On ascending degeneration after partial section of the spinal 



cord. 386. 

 LANGELAAN (j. w.). On the development of the Corpus Callosum in the human 



brain. 344. 

 LAW of Boyle-Charles ([nflueuce of the deviations from the) on the temperature 



measured on the scale of the gas-thermometer of constant volume according to 



observations with this apparatus. 743. 

 LEI and Schist (On the terms Schalie). 433. 



LIGHT (The electric response of the eye to stimulation by) at various intensities. 698. 

 LIMBURG (On ore veins in the province of). 76. 

 LIQUID PHASE (On the gaspha=e sinking in the) for binary mixtures in the case that 



the molecules of one component exert only a feeble attraction. 274. 

 LORENTZ (H. A.) presents a paper of J. J. van Laar: "On the course of the 



plait point line and of the spinodal lines, also for the case, that the mutual 



attraction of the molecules of one of the components of a binary mixture of 



normal substances is slight. 34. 



— presents a paper of J. J. van Laar: "Some remarks on the last observations 

 of Prof. H. Kamerlingh Onnes and W. H. Keesom". 238. 



— presents a paper of Dr. 0. Postma : "Motion of molecule-systems on which no 

 external forces act". 390. 



— presents a paper of Prof. \V. Voigt: "On the permissible orders of the axes 

 of symmetry in crystallography". 408. 



LÖWE (f.), Gr. J. Elias and H. E. J. G. du Bois. An auto-collimating spectral 



apparatus of great luminous intensity. 729. 

 luminous INTENSITY (An auto-collimating spectral apparatus of great). 729. 

 LUPEOL (On). 292. 

 P lyrae as a double star. 459. 



MAGNETIC disturbances (The starting impulse of). 773. 

 M.^GNETIC field (The absorption spectra of the compounds of the rare earths at the 



temperatures obtainable with liquid hydrogen and their change by the). 592. 

 MAGNETIC FORCE (Magnetic revolution of spectral lines and). 2nd part. 351. 

 MAGNETIC RESOLUTION (Observations of the) of spectral lines by means of the method 



of Fabry and Perot. 440. 

 MAGNETIC revolution of spcctral lines and magnetic force. 2iid part. 351. 

 MAGNETISATION (The influence of temperature and) on selective absorption spectra. 



578. II. 734. 111. 839. 

 MAGNETISM (The intensities of the components of spectral lines divided i)y). 289. 

 MARTIN (k.) presents a paper of P. Tesch : "Considerations on the Staringian "Zand- 



diluvium". 108. 

 Mathematics. J. A. Barrau: "The extension of the configuration of Kummer to spaces 



of (2p — I) dimensions". 263. 



