xit C0) "NRE Ne ED; 
Physics. P. ZEEMAN: Some observations concerning an asymmetrical change of the 
spectral lines of iron, radiating in a magnetic field.” 298, 
— J. D. van per Waars Jr.: The Entropy of Radiation” (communicated by 
Prof. J. D. van DER Waars). I. 308. If. 413. 
— J. D. van per Waats: /The cooling of a current of gas by sudden change of 
pressure.” 379. 
— H. Hursnor: vThe direct deduction of the capillary constant ¢ as a surface- 
tension” (communicated by Prof. J. D. van DER Waats). 389. 
— W. H. Junius: /Svlar Phenomena considered in connection with anomalous 
dispersion of sight” 467. 575. 
— J. D. van Der Waars Jr. : /Fquations in which functions occur for different values 
of the independent variable” (communicated by Prof. J. D. van per Waats). 534. 
— H. A. Lorentz: 7Considerations on Gravitation.” 559. 
— J. E. VERSCHAFFELT : /On the critical isothermal line and the densities of satur- 
ated vapour and liquid in isopentane and carbon dioxide” (communicated by 
Prof. H. KAMERLINGH ONNEs). 574. 588 
Physiology. H. J. HaAMmBurGEr: The resorption of fat and soap in the large and the 
small intestine.” 234, 287. 
— H. J. HAMBURGER : vLipolytic ferment in ascites-liquid of man.” 406. 428. 
— H. J. HAMBURGER: „On the power of resistance of the red blood-corpuscles.” 574, 
— M. A. van MELLE : /Some reflexes on the respiration in connection with LABORDE’s 
method to restore, by rhythmical traction of the tongue, the respiration suppressed 
in Narcosis” (communicated by Prof. C. Winx Ler). 640. 
PIEZOMETERS (Precision-) with variable volume for gases. 29. 
PIKRO-CARMINE (A simple and rapid method for preparing neutral). 409. 
POLARISATION (Measurements on the magnetic rotation of the plane of) in oxygen at 
difterent pressures. 19. 
POLE OF THE EARTH (The |4-monthly period of the motion of the) from determinations 
of the azimuth of the meridian marks of the Leiden observatory from 1882— 1896. 546. 
POMUS in Pomo. 331. 
POTASSIUMNITRATE (On mixei crystals of Sodiumnitrate with) and of Sodiumnitrate 
with Silvernitrate. 158. 
POTENTIAL FUNCTION (A rema:k on the molecular) of Prof. vaN DER Waats. 163. 
— (The) g(r) zi d Se Jz) 
VAN DER Waals. 247. 
PRESSURE (The cooling of a current of gas by sudden change of). 379. 
and ¢(7) = and the potentialfunction of 
PRESSURES (Measurements on the magnetic rotation of the plane of polarisation in 
oxygen at different). 19. 
PRIME NUMBERS (Approximation formulae concerning the) not exceeding a given limit. 599. 
QUINT GZN. (N.). The determination of isothermals for mixtures of If Cl and C,H,. 40. 
auintics (On twisted) of genus unity. 374. 
RADIATION (The Entropy of). I. 308. IL. 413. 
REFRACTIVITY (The determination of the) as a method for the investigation of the 
composition of co-existing phases in mixtures of acetone and ether. 101. 
