CONTENTS. 
ABSORPTION. LINES (Double refraction near the components of) magnetically split into 
several components. 435. 
ABSORPTION SPECTRA (Dispersion bands in). 134. 
ACETONE (On Px-curves of mixtures of) and ethylether and of carbontetrachloride and 
acetone at 0°C, 162. 
ACID (Sulphoisobutyric) and some of its derivatives. 275. 
ADMIXTURES (The influence of) on the critical phenomena of simple substances and 
the explanation of TEIcHNER’s experiments. 474. 
ALGEBRAIC PLANE CURVE (On an expression for the class of an) with higher singu- 
larities. 42. 
— (On an expression for the genus of an) with higher singularities. 107. 
— (On the curves of a pencil touching an) with higher singularities, 112, 
ALGEBRAIC PLANE CURVES (On nets of). 631. 
— (On linear systems of). 711. 
ALGEBRAIC SURFACE (Some characteristic numbers of an). 716. 
Anatomy. J. W. LANGELAAN: “On the Form of the Trunk-myotome”. 34. 
— A. J. P. van DEN Broek: “On the genital cords of Phalangista vulpina”. 87. 
— E. pre Vries: “Note on the Ganglion vomeronasale”. 704. 
— J. W. van Bissentck: “Note on the innervation of the Trunkmyotome”. 708, 
ANGLES (On the equation determining the) of two polydimensional spaces. 340. 
ARBITRARY HIGH RANK (On moments of inertia and moments of an arbitrary order in 
spaces of). 596. 
Astronomy. C. Eason: “On the apparent distribution of the nebulae”. 117. 
— C. Easton: “The nebulae considered in relation to the galactic system”, 125. 
— J. Weeper: “A new method of interpolation with compensation applied to the 
reduction of the corrections and the rates of the standard clock of the Observatory 
at Leyden, Hohwii 17, determined by the observations with the transitcircle in 
1903”, 241. 
— J. A. C. OUpEMANs: “A short account of the determination of the longitude 
of St. Denis (Island of Réunion) executed in 1874”. 602. 
— J. Werprr: “Approximate formulae of a high degree of accuracy for the 
relations of the triangles in the determination of an elliptic orbit from three 
observations”. 752. 
Proceedings Royal Acad, Amsterdam. Vol. VIL. 53 
