XIV CONTENTS. 
LORENTZ (H. A.) presents a paper of Dr. G. J. Exias; “On the lowering of the 
freezing point in consequence of an elastic deformation”. 732. 
—- presents a paper of Dr. G. J. Eras: “The effect of magnetisation of the elec- 
trodes on the electromotive force”. 745. 
— presents a paper of Dr. L. S. ORNSTEIN: “On the theory of the string galvano- 
meter of EINTHOVEN”. 784. 
— presents a paper of Dr. L. S, OrNsteiN and Dr. F. Zeentke: “Accidental 
deviations of density and opalescence at the critical point of a single sub- 
stance”. 793. 
— presents a paper of Mrs. T, Enrenrest—AranassjEwa: “Contribution to the 
theory of corresponding states”. 840. 
— presents a paper of Dr, J. J. van Laar: “The calculation jof the molecular 
dimensions from the supposition of the electric nature of the quasi-elastic atomic 
forces”. 877. 
— presents a paper of Mr, J. Drosre: “On the field of a single centre in 
ErxsTEIn’s theory of gravitation”. 998. 
— presents of paper of Mr. H. Terropg: “Theoretical determination of the entropy 
constant of gases and liquids”. 1167. 
— presents a paper of Prof, P. Enrenrest: “On interference-phenomena to be 
expected when RÖNrGeN rays pass through a di-atomic gas”. 1184. 
— presents a paper of Prof. P, Eurenrest: “On the kinetic interpretation of the 
osmotic pressure”. 1241. 
LUNAR PERIGEE (The motions of the) and node and the figure of the moon. 1309. 
MAGNETISATION (The effect of) of the electrodes on the electromotive force. 745. 
MAMMALIAN ORGANS (On the survival of isolated) with automatic function. 270. 
Mathematics. Jan pe Vries: “A cubic involution of the second class”. 105. 
— JAN pvp Vries: “A triple involution of the third class”. 134, 
— W. Kaprreyn: “On the functions of HERMITE”. 3th part. 139. 
— M. J. van Uven: “Ihe theory of Bravats (on errors in space) for polydi- 
mensional space with applications to correlation”. (Continuation). 150. 
— M. J. van Uven: “Combination of observations with and without conditions 
and determination of the weights of the unknown quantities, derived from me- 
chanical principles”. 157. 
— N. G. W. H. Bereer: “On Hermire’s and ABer’s polymonia”. 192, 
— W. Kapreyn: “On some integral equations”. 286. 
— M. J. van Uven: “The theory of the combination of observations and the 
determination of the precision, illustrated by means of vectors”. 490. 
— J.C. Kuvyver: “On an integral formula of SrieutJes”’. 829. 
— Jan DE Vries: “Characteristic numbers for nets of algebraic curves”, 935. 
— Jan pp Veres: “Characteristic numbers for a triple infinite system of algebraic 
plane curves”, 1055. 
— Jan pr Veres: “Systems of circles determined by a pencil of conics”. 1107. 
— W. van DER Woupe: “On Nörnem’s theorem”, 1245. 
— JAN pe Vries: “A bilinear congruence of rational twisted quintics”. 1250, 
