xn CON T E N T S. 



KRAKATAU (Oil liomceoQ;eneous iiiclusions of Kawali Idjen, Goentoer aiul) aiul their 



connection with the surrouiiding eruptive rocks. 995. 

 KBUYT (h. r.) Pseudoternary systems of acid anhydrides and water. I. Phthalic 



anhydride. 712. 

 KUENEK (j. P.). The ditiusion-coefhcient of gases and the viscosity of gas-mixtures. 



1162. 

 iiud S. VV. Visser. Viscosimeter and volatile liquids. 75. 



— The virialcoefficient B for normal butane. 350. 



— The viscosity of the vapyur of normal butane. 355. 



LAAR (j. J. van). Some difticullies and contradictions met with in the drawing up 



of the equation of state. 44. 

 — A new relation between the critical quantities and on the unity of all the 



substances in their thermic behaviour. 808. 924. 1047. 

 LAUUEUR (e.) and W. 11. van der Meek. Velocity of the intestinal movements 



in difterent mammals. 65. 

 LAN GEL A an (j. w.). Experiments on the atonical muscle. 336. II. 571. 

 LAW of the partition of energy (On the). III. 84. IV. 401. V. 1082. 



— of segregation (The explanation of an apparent exception to Menuel's). 1021. 

 LAAVS of Proust and Henry (Connexion between the adsorption-isotherm and the). 970. 

 lead-accumulator (The influence of pressure on the EMF of the). 16 K 

 LEERSUM (p. van). On the presence of quinine in the seed of Cinchona Ledgeriana 



Moens. 153. 

 lepidosteus osseus (The arrangement of tlie motor roots and nuclei in the brain of 



Acipenser ruthenus and). 1032. 

 light (On the constancy of the velocity ot). 395. 



— (Adjustment to) in oats. 615. 



liquid-densities of hydrogen between the boiling point and the triple point. 245. 



liquids (Viscosimeter and volatile). 75. 



LITHIUMLINE (The red) and the spectroscopic determination of atomic weights. 155. 



LITHIUMOXIDE and Silica (On compounds of). 857. 



LixiviATiON (Economic). 201. 



LOBRY DE BRUYN ^c. A.) and A. Smits, The occurrence of an upper critical point 



of mixing at the coexistence of two mixed crystal phases. 557. 

 longitude of tue moon, (Investigation of the inequalities of approximately monthly 



period in the), according to the meridian observations at Greenwich. 124. Part 2. 



141. Addendum. 890. 

 LO rentz (h. a.) presents a paper of Mr. Ch. H. van Os: "On a system of curves 



occurring in Einstein's theory of gravitation". 40. 



— presents a paper of Mr. J. J. van Laar: "Some difticulties and contradictions 

 met with in the drawing up of the equation of state". 44. 



— presents a paper of Prof. P. Ehreneest : "A mechanical theorem of Boltzmann 

 and its relation to the theory of energy quanta". 591, 



— presents a paper of Mr. J. J. van Laar: "A new relation between the critical 

 quantities, and on the unity of all the substances in their thermic behaviour". 

 808. 924. 1047. 



