COEN T ENTS XV 
MAGNETISATION (On the reversible change of the remanent) with the temperature. 1068. 
- of iron (On the influence of alternating currents of decreasing intensity on 
the). 1299. 
MAGNETO-chemical researches on ferrous salts in solution. 254. 
MAGNETONS (The magnetic susceptibility and the number of) of nickel in solutions 
of nickelsalts. 246, 
MALIC ACID (Formation of pyruvic acid from) by microbes. 1198. 
MANGANESE (On the occurrence of nodules from) in mesozoie deep-sea deposits from 
Borneo, Timor and Rotti, their significance and mode of ‘formation. 415, 
MARSUPIALS (On the relation between the dentition of) and that of Reptiles and 
Monodelphians. 715. 
Mathematics. JAN ve Vries: “A particular bilinear congruence of rational twisted 
quintics.”” 39. 
«py 
— Jan ve Vries: “Bilinear congruences of elliptic and hyperelliptie twisted 
quinties.” 43. 
— L. E. J. Brouwer: “Remark on inner limiting sets.” 48. 
— Jan ve Vries: ‘Bilinear congruences of twisted curves, which are determined 
by nets of cubic surfaces.’ 431. 
— Cus. H. van Os: “Associated points with respect to a complex of quadrics.” 441. 
— J, G. Rereers: “On a linear integral equation of Vourerra of the first kind 
whose kernel contains a function of Bessen.” 769. 
— Cu. H. van Os: “On twisted quartics passing through eight associated points”. 
1147 
— J. CARDINAAL: “A posthumous work of Dr. P. H. ScHoure”. 1173. 
— Jan pe Veres: “Characteristic numbers for nets of algebraic surfaces”. 1270. 
— Jan DE Vries: ‘Tangential curves of a pencil of rational cubics”. 1277. 
— Hk. pr Vries: ‘Circles cutting a plane curve perpendicularly”. I, 1449, 
— Jan DE Vries: “A simply infinite system of twisted cubies”, 1464. 
— K. W. Rurcers: ‘On the nature of the limiting surface for multiple space 
transformations”. 1636. 
MATHEWS’ so-called valency-law (On the validity of). 1235. 
METAMEROLOGICAL signification (On the) of the craniovertebral interval. 191. 
METASTABILITY (The) of the elements and chemical compounds in consequence of 
Enantiotropy and Monotropy and its bearing on Chemistry, Physics and Technics. 
TE. 961. 
Meteorology. J. P. van DER Stok: “The relation between meteorological conditions 
in the Netherlands and some circumjacent places. Atmospheric pressure. 310. 
Difference of atmospheric pressure and wind. 321. 
— P. H. Garrf: “On the relation between fluctuations in the strength of the 
trade winds of the North Atlantic Ocean in summer and departures from the 
normal of the wintertemperature in Europe.” 1435, 
METHODS and apparatus used in the Cryogenic Laboratory. XVI. 507. 
METHYLETHYLKETONE (Actiou of) on 2.3.4.6. tetranitrophenylmethylnitramine. 98. 
MEYER (G.), A. Smits and R. Pu. Beck. On black phosphorus. I. 992. 
