CONTENTS. xr 
KLUYVER (3. C.). Evaluation of two definite integrals. 201. 
KOHNSTAMM (Pi). A formula for the osmotic pressure in concentrated solutions 
whose vapour follows the gas laws. 723. 
— Kinetic derivation of van *£ Horr’s law for the osmotic pressure in a dilute 
solution. 729. 
— Osmotic pressure and thermodynamic potential. 741. 
KORTEWEG (D. J.) presents a paper of Mr. Frep. Scuus: “On an expression for 
the class of an algebraic plane curve with higher singularities”. 42. 
— presents a paper of Mr. Frep. Scuuu: “On an expression for the genus of an 
algebraic plane curve with higher singularities”, 107. 
— presents a paper of Mr. Frep. Scuun: “On the curves of a pencil touching an 
algebraic plane curve with higher singularities”, 112. 
— and D. pe Lance. Multiple umbilics as singularities of the first order of except- 
ion on point-general surfaces, 386. 
KUYPER (H. P.). On the development of the perithecium of Monaseus purpureus 
Went and Monascus Barkeri Dang. 83. 
LAAR (J. J. VAN). On the latent heat of mixing for associating solvents. 174. 
— On some phenomena which can occur in the case of partial miscibility of two 
liquids, one of them being anomalous. 517. 
— On the different forms and transformations of the boundary-curves in the ease 
of partial miscibility of two liquids, 636. 
— An exact expression for the course of the spinodal curves and of their plait- 
points for all temperatures, in the case of mixtures of normal substances. 646. 
LANDAU (EDMUND). Remarks on the paper of Mr. Kiuyver: “Series derived 
from the series s———”. 
ii 
ACORN 
il 
LANGE (D. DE) and D. J. Korrewee. Multiple umbilics as singularities of the first 
order of exception on point-general surfaces. 386. 
LANGE (s. J. DE). On the branchings of the nerve-cells in repose and after 
fatigue. 599. ; 
LANGELAAN (J. w.). On the Form of the Trunk-myotome, 34, 
LATITUDE (Determinations of) and azimuth made in 1896—99. 482. 
Law of corresponding states (The conditions of coexistence of binary mixtures of 
normal substances according to the). 222. 
— of corresponding states (The validity of the) for mixtures of methyl chloride 
and carbon dioxide. 285, 377. 
LEPTOSTROMA AUSTRIACUM OUD., (On), a hitherto unknown Leptostromacea living on 
the needles of Pinus austriaca. 206. 
LIQUID LAYERS (Critical terminating points in three-phase lines with solid phases in 
binary systems which present two). 556, 
LIQUID PHasES (The determination of the conditions of coexistence of vapour and) of 
mixtures of gases at low temperatures, 233, 
Liguips (On some phenomena which can occur in the case of partial miscibility of 
two), one of them being anomalous, specially water. 517. 
