XVI CONTENTS 
Microbiology. Miss H. J. van LurtsENBurG Maas and G. van [TERSON Jr: “A 
miecrosaccharimeter.” 258. 
— M. W. Beijerinck and T. Foremprs: “Formation of pyruvic acid from malic acid 
by microbes.” 1198. 
MICROSACCHARIMETER (A). 258. 
Mineralogy. A. WichManN: “On phosphorite of the isle of Ajawi.” 214. 
— F. M. JarGEr and H. Haca: “On Röntgen-patterns of isomorphous crystals”. [857. 
MIXTURES (Isothermals of diatomic substances and their binary). XV. 409. XVII. 458. 
XVIII. 465. 
— (Isothermals of monatomic gases and of their binary). XVII. 515. 
MOLECULAR CURRENTS (Experimental proof of the existence of AMPÈRE's). 696. 
MOLECULES (The second virial coefficient for rigid spherical) whose mutual attraction 
is equivalent to that of a quadruplet placed at their centre. 636. 
— (On the second virial coefficient for rigid spherical) carrying quadruplets. 1568. 
— (Two theorems concerning the second virial coefficient for rigid spherical) which 
besides collisional forces only exert CouLoms forces and for which the total charge 
of the active agent is zero. 868. 
— (The clustering-tendency of the) in the critical state and the extinction of light 
caused thereby. 1520. 
MOLENGRAAFF (G. A. F.). On the occurrence of nodules of manganese in mesozoic 
deep-sea deposits from Borneo, Timor and Rotti, their significance and mode of 
formation. 415. 
— presents a paper of Dr. H. A. Brouwer: “On the post-carboniferous age of 
granites of the higlands of Padang”. 1513. 
— presents a paper of Mr. W.C. Krein: “On a trilobite fauna of presumably 
devonian age in the Dutch East Indies near Kaloeé (Tamiang district S.E. Atjeh). 
1632. 
— presents a paper of Dr. H. A. Brouwer: “Pneumatolytie hornfels from the hill 
countries of Siak (Sumatra).” 584. 
MOLL (J. w.). presents a paper of Miss Tine Tammes: “On the mutual effect of 
genotypic factors”. 1056. 
— presents a paper of Miss E. U. Fyan: “Some young-pliocene Ostracods of 
Timor”. 1205. 
MOMENTUM (Further experiments on the moment of) in a magnet. 1281. 
MONODELPHIANS (On the relation between the dentition of Marsupials and that of 
Reptiles and). 715. 
mMonotropy (The metastability of the elements and chemical compounds in consequence 
of enantiotropy or), and its bearing on Chemistry, Physics and Technics. I. 961. 
MONSTRA (On the brains of cyclops and) related to them. 1399. 
MOON (Observation of the) during the eclipse of the sun on Aug. 21, 1914 and of the 
transit of Mercury on Nov. 7, 1914 made in the Leiden Observatory. 16. 
MUSCULAR abdominal wall of primates (On the structure of the). 19. 
MUSCULAR TONUs (Further observations on the relation between the) and the amount 
of kreatin in the muscles. 1564. 
