CONTENTS XIII 
KOHNSTAMM (PH.) and K. W, Warsrra. Measurements of isotherms of hydrogen 
at 20° C. and 150,5 C. 203. 
KORTEWEG (pb. J.). The different ways of floating of an homogeneous cube. 224, 
KRUYT (H. R.). Current potentials of electrolyte solutions, 615. 
— Electric charge and limit value of colloids. 623. 
— and Jac. van DER Spek. The connection between the limit value and the 
concentration of arsenic trisulphide sols. 1158. 
KUENEN (J. e.). On the measurement of the capillary pressure in a soap-bubble. 946, 
— The diffusion-coefficient of gases and the viscosity of gas-mixtures. 1068. 
KUIPER JR. (K.). The physiology of the air-bladder of fishes. 1088. 
KUYPERS (H. A.) and H. KAMERLINGH ONNEs. Measurements on the capillarity of 
liquid hydrogen. 528. 
LAAR (J. J. VAN). A new relation between the critical quantities and on the unity 
of all substances in their thermic behaviour. 451. 
— Some remarks on the values of the critical quantities in case of association. 598. 
— On apparent thermodynamic discontinuities in connection with the value of the 
quantity 4 for infinitely large volume. 606. 
— The calculation of the molecular dimensions from the supposition of the electric 
nature of the quasi-elastic atomic forces. 877. 
LAQUEUR (E.). On the survival of isolated mammalhan organs with automatic 
function. 270. 
LEAD (The allotropy of). I. 822, Note. 1055. 
— (Measurements on the specific heat of) between 14° and 80° Kk. and of copper 
between 15° and 22° K, 894. 
LIGHT (On FRESNEL’s coefficient for) of different colours, 445. 
LIMIT VALUE (Electric charge and) of colloids. 623. 
— (The connection between the) and the concentration of arsenic trisulphide 
sols. 1158. 
LiQuips (On the behaviour of gels towards) and the vapours thereof. IL, 92. 
— (Theoretical determination of the entropy constant of gases and). 1167. 
— (The temperature-coefficients of the free energy-surface of) at temperatures from 
—80° C. to 1650° C. I. 329. IL. 365. IIL. 389. IV. 395. V. 405. VI. 416. VIL. 
555. VIIL 571. 
LORENTZ (H. A.) presents a paper of Dr. J. J. van LAAR: “A new relation between 
the critical quantities and on the unity of all substances in their thermic 
behaviour”. 451. 
— presents a paper of Dr. J. J. van LAAR: “Some remarks on the values of the 
critical quantities in case of association’. 598. 
— presents a paper of Dr. J. J. van Laar: “On apparent thermodynamie discon= 
tinuities in connection with the value of the quantity 4 for infinitely large 
volume”. 606. 
— presents a paper of Dr. G, J, Erras: “On the structure of the absorption lines 
D, and D,”, 720, 
