X, GON TEN DB 
Mathematics. L. E. J. Brouwer: “Continuous one-one transformations of surfaces in 
themselves”. 788. 
— W. KapreyN: “On a class of differential equations of the first order and the 
first degree”, 813. 
— Z. P. Bouman: “A family of differential equations of the first order”. 847. 
— L. E. J. Brouwer: “On continuous vector distributions on surfaces’. 859. 
MEASUREMENT (On the) of very low temperatures. XXI. On the standardizing of tem- 
peratures by means of boiling points of pure substances. The determination of 
the vapour pressure of oxygen at three temperatures, 333. XXII. The thermo- 
element gold-silver at liquid hydrogen temperatures, 344, 
MEASUREMENTS (The breaking stress of glass and the use of glass tubes in) under 
high pressure at ordinary and low temperatures, 30. 
MECHANICS (Calculation of the pressure of a mixture of two gases by means of G1BBs’s 
statistical). 116. 
MEERBURG (J. H.). On the motion of a metal wire through a piece of ice. II, $86. 
MERCURY (Observation of the transit of) on November 14, 1907 at Chiloango in 
Portuguese West-Africa, 198. 
METAL WIRE (On the motion of a) through a piece of ice. II, 886. 
mETALS (The change of the resistance of pure) at very low temperatures and the 
influence exerted on it by small amounts of admixtures. II. 345. 
METHODS and apparatus used in the Cryogenic Laboratory. XV. An apparatus for the 
purification of gaseous hydrogen by means of liquid hydrogen. 883. 
Microbiology. M. W. Beijerinck: “Fixation of free atmospheric nitrogen by Azoto- 
bacter in pure culture. Distribution of this bacterium”, 67, 
— N. L. SöHNGEN: “The splitting up of ureum in the absence of albumen”, 513. 
— C. Eykxman: “Investigations on the subject of disinfection”. 668. 
MINERALOGIC and chemical composition (The) of some rocks from Central Borneo. 398. 
MIXTURES of carbonic acid and urethane (On the phenomena of condensation for), in 
connection with double retrograde condensation. 913. 
MOLECULAR ATTRACTION (On the law of) for electrical double points. 132. 315. 
MOLL (J. w.) presents a paper of Miss Tine Tames: “Dipsacan and Dipsacotin, 
a new chromogen and a new colouring-matter of Dipsaceae”. 509, 
— Carbon dioxide transport in leaves, 649. 
muscles (About the determination of hardness in). 43. 
NECTAR (On the biological significance of the secretion of) in the flower. 445. 
NERVE-FIBRES (The nervous system of a white cat, deaf from its birth. A contribution 
to the knowledge of the secondary systems of the auditory), 225. 
NERVOUS SYSTEM (On the structure of the ganglion-cells in the central) of Branchio= 
stoma lanc. 53. 
NETS (On fourdimensional) and their sections by spaces. 3rd part. 380, 4th part. 543, 
NiTRATION (The) of toluene. 248, 
— (The) of p-chlorotoluene. 257. 
— (The quantitative estimation of the products of) of m-chloro- and m-bromobenzoie 
acid. 260. 
