XII - CO ANAESERNATSS. 
JAEGER (fF. M.). The temperature-coeflicients of the free surface-energy of liquids at 
temperatures from —80° ©. to 1650° C. 1, 329. V. 405. VI. 416. VII. 555. 
WIil. ‘671: 
— On-a new phenomenon accompanying the diffraction of Röntgenrays in birefrin- 
gent crystals. 1204. 
— Researches on Pasreur’s principle of the connection between molecular and 
physical dissymmetry. [. 1217. 
— and H Haga. On the real symmetry of cordierite and apophyllite. 430. 
— and Jur, Kaun. The temperature coefficients of the free surface-energy of 
liquids at temperatures from —80° C. to 1650° C. LV. 395. 
— and ANT. SrMEK. Studies in the field of silicate-chemistry. IL. 239. ILL. 251. 
— and M. J. Smir. The temperature-ccefticients of the free surface energy of liquids 
at temperatures from —80° C. to 1650° C. LI. 365. IIL. 386. 
JONG (A. W. K. DE). Action of sunlight on the cinnamic acids. 1274. 
Juprrer (The figure of the planet). 1047. 
KAHN (JUL) and F. M. Jaren. The temperature-coefficients of the free surface— 
energy of liquids at temperatures from —80° C. to 1650° C. LV. 395. 
KAMERLINGH ONNES (H.). v. Onnes (H. KAMERLINGH). 
KAPPERS (C. U. ARIENS) and Pr Röruro. Further contributions to our know- 
ledge of the brain of Myxine glutinosa. 2. 
KAPTEYN (J. c.) presents a paper of Prof. M, J. van Uven: “The theory of 
Bravats (on errors in space) for polydimensional space, with applications to 
correlation”, Continuation. 150. 
KAPTEYN (w.). On the functions of Hermite. Lst part. 139. 
— presents a paper of Dr. N. G. W. H. Beecer: “On Hermire’s and ABEL’s 
polynomia”’. 192. 
— On some integral equations. 286. 
— presents a paper of Prof. M. J. van Uven: “The theory of the combination 
of observations and the determination of the precision, illustrated by means of 
vectors”. 49. 
KEESOM (w. u.). 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. 
— On the matter in which the susceptibility of paramagnetic: substances depends 
on the density. 110. 
— and H. KAMERLINGH Onnes. The specific heat at low temperatures. I. Measure- 
ments on the specific heat of lead between 14° and 80° K. and of copper 
between 15° and 22° K. 894. 
KETONES (The reduction of aromatic). III. Contribution to the knowledge of the photo- 
chemical phenomena. 849, 
KINETIC INTERPRETATION (On the) of the osmotic pressure. 1241. 
KINETIC QUANTITY (On the thermodynamic potential as a). Ist part. 85. 
KLUYVER (J. c.). On an integral formula of STIELTJES. 829. 
