CONTENTS. XI 



LAAR (j. J. tan). Some remarks ou Dr. Ph. Kohnstamm's last papers. 49. 



— The molecular rise of the lower critical temperature of a binary mixture of 

 normal components. 144. 



— On the course of the spiuodal and the plaitpuiut Hues for binary mi.\tures of 

 normal subetances. 3rd communication. 57S. 



— On the course of melting-point curves for compounds which are partially dissociated 

 in the liquid phase, the proportion of the products of dissociation being arbitrary. G99. 



LIGHT (On the theory of reflection of) by imperfectly transparent bodies. 377. 



— (On the propagation of) in a biaxial crystal around a centre of vibration. 728. 

 LINES (Contribution to the knowledge of the px- and j)T-) for the case that two 



substances enter into a combination which is dissociated in the liquid and the 

 gasphase. 200. 

 LIQUID (A method for determining the osmotic pressure of very small quantities of). 394. 



— and the gasphase (Contribution to the knowledge of tlie^.r- and the/; T-liues for the 

 case that two substances enter into a combination which is dissociated in the). 200. 



LIQUID PHASE (On the course of melting-point curves for compounds which are 

 partially dissociated in the) the proportion of the products of dissociation beiu" 

 arbitrary. 699. 



L^OBATSCHEFSKY (Central projection in the space of). 1st part. 389. 



LONGIÏDDE of St. Denis (Island of Keuuion) (Supplement to the account of the deter- 

 mination of the), executed in 1874, containing also a general account of the 

 observation of the transit of Venus. 110. 



LORENTZ (h. a.) presents a paper of J. J. van Laar: "On the shape of the 

 plaitpoint curves for mixtures of normal substances". 2n<i communication. 33. 



— presents a paper of J. J. va.n' Laar: "Some remarks ou Dr. Ph. Kohnstamm's 

 last papers". 49. 



— presents a paper of J. J. van Laar: "The molecular rise of the lower critical 

 temperature of a binary mixture of normal components". 144. 



— presents a paper of Prof. R. Sissingh: ''On the theory of reflection of light by 

 imperfectly transparent bodies". 377. 



— On the radiation of heat in a system of bodies having a uniform temperature. 401. 



— presents a paper of Prof. B. Sissingh: "Derivation of the fnndamenüil equations 

 of metallic reflection from Cadchï's theory". 486. 



— presents a paper of J. J. v.an Laar: "On the course of the spinodal and the 

 plaitpoint lines for binary mixtures of normal substances, (oid communication). 578. 



— The absorption and emission lines of gaseous bodies. 591. 



— presents a paper of 0. Postma; "Some remarks on the quantity H in Boltz- 

 mann"s : Vorlesungen über Gastheorie". 630. 



— presents a paper of L. S. Ornstein: "On the motion of a metal wirethrou"h a 

 lump of ice". 653. 



— presents a paper of H. B. A. Bockwinkel: "On the propagation of light in a 

 biaxial crystal around a centre of vibration". 728. 



LÜPEOL (On the presence of) in some kinds of gutta percha. 137. 

 magnetic force (Magnedc resolution of spectral lines and). 1st part. 814. 



