CONTENTS, vii 
KAMERLINGH ONNES (H.) presents a paper of J. C. ScHALKWIJK : , Precise 
Isothermals. IL. Accuracy of the measurement of pressure by means of the open 
manometer of KaMERLINGH ONNEs. 23. [IL A waterjacket of constant ordinary 
temperature. 29. IV. The calibration of piézometertubes. 35. V. The isothermal 
1 
of hydrogen at 20° C. up to 60 atmospheres”. 107. 
— Expression of the equation of state of gases and liquids by means of series. 125. 
— presents a paper of W. H. KresoMm : „Contributions to the knowledge of vaN 
DER Waars y-surface. V. The dependence of the plait-point constants on the 
composition in binary mixtures with small proportions of one of the components. 
293. VI. The increase of pressure at condensation of a substance with small 
admixtures. 659. 
— presents a paper of Dr. L. H. Srertsema: „The dispersion of the magnetic 
rotation of the plane of polarisation in negatively rotating salt-solutions. IT. Further 
measurements with potassium ferricyanide.” 339. 
— presents a paper of B. MEILINK; /On the measurement of very low temperatures. 
IV. Comparison of the platinum thermometer with the hydrogen thermometer’’. 495. 
— and H. H. Francis HynpMan: vIsotherms of diatomic gases and their binary 
mixtures. II. The determination of density with the piezometer of variable volume 
for low temperatures. 761. IIL. The isotherms of oxygen at 20°.0 C. 15°.6 C. 
0°.0 C. 767. IV. The compressibility of hydrogen at 0°.0 C. and 20°.0 CG, 
determined by the piezometers with variable volume for low temperatures”. 776. 
KAPTEYN’s (J. c.) (On) criticism of Atry’s method to determine the apex of the solar 
motion, 221. Reply to it. 232. 
KAP TEYN (w.). Special cases of Monee’s differential equation. 21. 
— A definite integral containing Bessri’s functions. 102, 
— The differential equation of Monar. 423. 
— presents a paper of Prof. L. GEGENBAUER: vOn integrals containing functions 
of DESSEL”. 538+. 
KARANG SAGO (Sumatra) (Preliminary report of the Dutch expedition to) for the 
observation of the total solar eclipse of May 1901. 593. 
KEESOM (w. I). Contributions to the knowledge of vaN per: Waars y-surface. 
V. The dependence of the plait-point constants on the composition in binary 
mixtures with small proportions of one of the components. 293, VI. The increase 
of pressure at condensation of a substance with small admixtures. 659. 
KLEIN (ALEX). Bacteriologic researches of human faeces. 65. 
— The physiological Bacteriology of the intestinal canal (The bacteriological rela- 
tions in the intestinal canai of the rabbit). 477. 
KLUYVER (J. C.). Series of polynomials. I. 525. II. 620. 
KOHNSTAMM (PH. A.). The shape of an empiric isothermal of a binary mixture, 320. 
— and B. M. van DALFSEN. Vapour-tensions of mixtures of ether and chloro- 
form. 156. 
LAAR (J. J. VAN). On the asymmetry of the electro-capillary curve. 560. 
LANGELAAN (Js. w.). Further investigations on muscle-tone. 10. 
— The principle of entropy in physiology. 698, 706, 
