CON TLE NT ss XV 
Mathematics. JAN pr Vries: “Some particular bilinear congruences of twisted cubics”. 
1256. 
MATHIAS (B), H. KAMERLINGH ONNEs and C. A, CROMMELIN. The rectilinear 
diameter of nitrogen. 953. 
MEASUREMENT (The) of very low temperatures. XXIV, The hydrogen and helium. 
thermometers of constant volume, down to the freezing point of hydrogen compared 
with each other and with the platinum-resistance thermometer. 501. 
MEASUREMENTS on the-capillarity of liquid hydrogen. 528. 
— of isotherms of hydrogen at 29 C. and 15°95 C. 203. 
— on the specific heat of lead between 14° and 80° K. and of copper between 
15° and 22° K. 894, 
MEASURING BAR (Comparison of the) used in the base measurement at Stroe with the 
Dutch Metre NO, 27. 500. 
— (Comparison of the Dutch platinum-iridium Metre NO, 27 with the international 
Metre M as derived from the measurements by the Dutch Metre-Commission in 
1879 and 1880, and: a preliminary determination of the length of the) of the 
French base-apparatus in international metres. 311. 
MECHANICAL PRINCIPLES (Combination of observations with and without conditions and 
„determination of the weights of the unknown quantities derived from). 157. 
METALS (The metastability of) in consequence of allotropy, and its significance for 
Chemistry, Physics and Technics. 200. III. 926. 1V. 1238. 
— (On the electrical resistance of pure). IX. 508. 
METASTABILITY (The) of metals in consequence of allotropy and its significance for 
Chemistry, Physics and Technics. 200. LIL. 926. IV. 1238. 
METHYLAMINE (On the interaction of ammonia and) on 2. 3. 4.-trinitrodimethylaniline. 
1034, 
METRE No. 27 (Comparison of the Dutch platinum-iridium) with the international 
metre M as derived from the measurements by the Dutch Metre-Commission in 
1879 and 1880, and a preliminary determination of the length of the measu: 
ring bar of the French baseapparatus in international metres. 311. 
Mineralogy. H. Haga and HF. M, Jarcer: “On the real symmetry of cordierite and 
apophyllite””. 450. 
— C. E. A. WicHMaNN : “On the tin of the island of llores”. 474. 
MOLECULAR DIMENSIONS (The calculation of the) from the supposition of the electric 
nature of the quasi-elastic atomic forces. 877. 
MOLENGRAAFF (G, A. F.) presents a paper of Dr. H. A, Brouwer: “On the 
granitic area of Rokan (Middle-Sumatra) and on contact-phenomena in the sur- 
rounding schists’. L190. 
moon (The motions of the lunar perigee and node and the figure of the). 1309. 
MOON’S PARALLAX (The mean radius of the earth, the intensity of gravity and the), 1291. 
MUSCLE-CELLS (On the termination of the efferent nerves in plain) and its bearing 
on the sympathetic (accessory) innervation of the striated muscle-fibre. 982. 
MUSCULAR FIBRE (On the mode of attachment of the) to its tendonfibres in the 
striated muscles of the vertebrates, 989, 
