GONE HEN TS XVII 
OSMOTIC PRESSURE (On the kinetic interpretation of the). 1241. ° 
OXYGEN (Vapour pressures of) and critical point of oxygen and nitrogen. 950. 
PARAMAGNETIC SUBSTANCES (On the matter in which the susceptibility of) depends on 
the density. 110. 
PASTEUR’s principle (Researches on) of the connection between molecular and 
physical dissymmetry. I. 1217. 
PEACHALMOND (Gummosis in the fruit of the Almond and the) as a process of normal 
life. 810. 
Petrography. A. WicuMann: “On some rocks of the island of Taliabu (Sula islands), 226. 
PHAGOCYTES and respiratory centre. 1325. 
PHOSPHORUS (On the vapour pressure lines of the system). IL. 678. IIL. 962. 
— (Further particulars concerning the system). 973. 
PHOTOCHEMICAL phenomena (Contribution to the knowledge of the). 849. 
PHOTOTROPIC and geotropic reactions (On the mutual influence of) in plants. 1278. 
Physics. H. KAMERLINGH Onnes: “Further experiments with liquid helium”. J. 12. 
278. K. 283. L. 514. N. 520. M. 760. 
— W. H. Kegsom: “The chemical constant and the application of the quantum- 
theory by the method of the natural vibrations to the equation of state of an 
ideal monatomic gas”. 20. 
— H. Huisuor: “On the thermodynamic potential as a kinetic quantity”. 1st part. 85. 
-- W. H. Kersom: “On the manner in which the susceptibility of paramagnetic 
substances depends on the density”. 110. 
— Pu, Kounstamm and Kk, W. Warsrra: ‘Measurement of isotherms of hydrogen 
at 20° C. and 15% C,” 203. 
— K. W. Warsrra: “The hydrogen isotherms of 20° C, and of 1595 C. between 
1 and 2200 atm.” 217. 
— C. A. CROMMELIN: “‘[sothermals of monatomic substances and their binary 
mixtures”, XVI. 275. 
— P. ZEEMAN: ‘FResNEL’s coefficient for light for difterent colours’. 1‘tpart. 445, 
— J. J. van Laar: “A new relation between the critical quantities and on the 
unity of all substances in their thermic behaviour”, 451. 
— H. vu Bois: “Modern electromagnets, especially tor surgical and metallurgic 
practice”. 468, 
— H. KAMERLING ONNEs and G. Horst: “On the measurement of very low 
temperatures, XXIV, The hydrogen and helium thermometers of constant volume, 
down to the freezing-point of hydrogen compared with each other and with the 
platinum resistance thermometer”, 501, 
= H, KAMERLINGH Onnus and G, Horst; “On the electrical resistance of pure 
metals etc.”, IX. 508, 
— H, KAMERLINGH ONNEs and H, A, Kuypers: “Measurements on the capillarity 
of liquid hydrogen”. 528; 
= J. J. van LAAR: “Some remarks on the values of the critical quantities in case 
of association”. 598. 
90 
Proceedings Royal Acad. Amsterdam. Vol. XVII. 
