IV CONTENTS 



Geanticlines (Fractures and faults near the surface of moving). H. Abnor- 

 mal strikes near the bending-points of the horizontal projection of the 

 geahticlinal axis. 327. 



Geometry (A new method for the solution of the problem of the character- 

 istics in the enumerative). 113. 



Germanium (The crystal structure of). 125. 



Griggs (R. F.). Observations on the incandescent sand flow of the valley 

 of ten thousand smokes. 42. 



Hamburger (L.). On centres of luminescence and variations of the gas 

 pressure in spectrum tubes at electrical discharges. II. 463. 



Hamburger (R. J.). On the significance of calcium- and potassiumions 

 for the artificial oedema and for the lumen of the bloodvessels. 145. 



Helium (Further experiments with liquid). Q. On the electric resistance of 

 pure metals etc. X. Measurements concerning the electric resistance of 

 thallium in the temperature field of liquid helium. 443. XI. Measure- 

 ments concerning the electric resistance of ordinary lead and of 

 uranium lead below 14*= K. 451. 



Herelle (d') (Studies on the bacteriophagus of). 31. II. 87. III. 171. 



Hertz (G.). On the mean free path of slow electrons in neon and argon. 90. 



— On the excitation and ionization potentials of neon and argon. 179. 

 Appendix. 442. 



— On the separation of gas mixtures by diffusion in a flowing gas. 434. 

 Heux (J. W. N. le). Explanation of some interference-curves of uni-axial 



and bi-axial crystals by superposition of elliptic pencils. III. 81. 

 HoLLEMAN (A. F.). Monochloro-trinitrobenzenes. 223. 

 HoRiBA (Shinkichi). Determination of the vapour pressure of metallic 



arsenic. 387. 

 Hydrogen ion concentration (The influence of) upon the action of, the 



amylase of Aspergillus niger. 6. 

 Humans van den B erg h (A. A.) v. Bergh (A. A. Humans van den). 

 Inflammation of the udder (Changes in milk due to sterile). 275. 

 Ionization potentials (On the excitation and) of neon and argon. 179. 



Appendix. 442. 

 J A n z E n (J. W.) and L. K. Wolff. Studies on the bacteriophagus of d'Herelle. 



31. II. 87. III. 171. 

 Jong (A. W. K. de). The biscoumaric acids. 175. 

 Jong (L. E. den Dooren de) and M. W. Beuerinck. On bacillus poly- 



myxa. 279. 

 Kamerlingh Onnes (H.) v. Onnes (H. Kamerlingh). 

 Karssen (A.) and J. M. Bijvoet. Research by means of Röntgen-rays on 



the structure of the crystals of lithium and some of its compounds with 



light elements. II. Lithium-hydride. 27. 



