X CONTENTS. 



METHODS and appiimtus used in the Cryogenic Laboratory. III. Bath of very uniform 

 and constant low temperatures in the cryostat. 502. 628. A cryostat of modified 

 form for apparatus of small dimensions. 628. IV. A permanent bath of liquid 

 uitrogen at ordinary and at reduced pressure. 631 . V. Arrangement of a Bcuckhardt- 

 Weiss vacuumpump for use in the circulations for low temperatures. 633. 



METHYLALCOHOL (Critical phenomena of partially miscible liquids-T']thane and). 473. 



METHYLCHLORiDE (Measurements with). 243. 



METHYLP:NE-derivatives. See Tormaldeiiyde (methylene)-derivatives. 



Microbiology. G. van Iterson Jr.: "Accumulation experiments with denitrifying bac- 

 teria". 148. 



— Gr VAN Iterson Jr. : "The decomposition of cellulose by aerobic micro-orga- 

 nisms," 685. 



mikroskeletons (A new method for demonstrating cartilaginous). 47. 

 Mineralogy. E. H. M. Beekman : "On the behaviour of disthene and of sillimanite 

 at high temperature." 240. 



— P. 1'esch : "On the refractive index of rockglasses." 602. 



— G. B. HoGENRAAD : "On an '/Eisenrose" of the St. Gotthard." 605. 

 MIXING APPARATUS (An accurate volumenometer and). 686. 



MIXTURES (The equation of state and the (1,-surface in the immediate neighbourhood 

 of the critical state for binary) with a small proportion of one of the components. 

 321. 336. 



— (Isotherms of diatomic gases and their binary). 636. 

 MOLECULAR transformation (Some observations on the course of the). 303. 



MOLL (j. w.) presents a paper of Mr. J. H. Bonnema : "Cambrian erratic-blocks at 

 Hemelura in the South-West of Frisia." 140. 



— presents the dissertation of Dr. J. C. Schoute : "Die Stelar-Theorie." 497. 



— presents a paper of ^Mr. J. H. Bonnema : "Some new under-cambrian erratic- 

 blocks from the Dutch diluvium". 561. 



— presents a paper of Mr. J. H. Bonnema : "Two new raid-cambrian erratic-blocks 

 from the Dutch diluvium." 652. 



M o N Ü E (On the spheres of) belonging to ordinary and tangential pencils of qua- 

 dratic surfaces. 484. 

 MOTION of variable systems (On the geometrical representation of the). 386. 

 MUSCLES in Amphioxus lanceolatus (On the structure of the light-percepting cells in 



the spinal cord, on the neurofibrillae in the ganglioncells and on the innervation 



of the striped) in Amphioxus lanceolatus. 350. 

 MUTATION of plants (Investigations of glucosides in connection with the internal). 295. 

 NEUROFIBRILLAE (On the Structure of the lightpercepting cells in the spinal cord, 



on the) in the ganglioncells and on the innervation of the striped muscles in 



Amphioxus lanceolatus. 350. 

 NIEROP (a. s. van) and L. Abonstein. On the action of sulphur on Toluene and 



Xylene. 288. 

 N I E u w E N H u I s (A. "w.). Influence of changed conditions of life on the physical 



and psychical development of the population of Central-Borneo. 525. 



