XII OvOPNE ERO ENT Das. 
Mathematics. J. G. vaN per Coreur: ‘On the values which the function 2(s) assumes 
for s positive and odd”. 489. 
— M. J. van Uven: “Logarithmic frequency distribution”. 533. 
— M. J. van Uven: “Skew frequency curves”. 670. 
— J. C. Kruyver: “The primitive divisor of am—l’. 785. 
— J. G. VAN DER Corput: “On an arithmetical function connected with the 
decomposition of the positive integers into prime factors”. J. 826. IL. 842. 
— H. B, A. BoCKWINKEL: “Some considerations on complete transmutation’’. I. 
856 IL. 1100, 
— J. Worrr: “On the nodal-curve of an algebraic surface”. 1115. 
— Jan pe Vries: “Two null systems determined by a net of cubics”. 1124. 
— K. W. Warsrra: “On a representation of the plane field of circles on point- 
space”. 1130. 
— Cus. H van Os: “A quadruply infinite system of point groups in space”. 1133. 
MAX WELL (An experiment of) and AMPERE's molecular currents. 248. 
Mechanics. W. ve Sitrer: “On the relativity of rotation in ErNsreiN’s theory”. 527. 
— W. ve Sitter: “On the relativity of inertia. Remarks concerning EINSTEIN'’s 
latest hypothesis”. 1217. 
MELTING POINT (Note on the) of palladium and WIeEN’s constant cz. 549. 
MEMORY (Intercomparison of some results obtained in the investigation of) by the 
natural and the experimental learning-method. 1242, 
MERCURY-IODIDE (On the system). 703. 
MERIDIANCIRCLE (On a peculiar anomaly occurring in the transit-observations with 
the Leiden) during the years 1864-1868. 345. 
METABOLISM of Aspergillus niger. 215. 
METAL (On the electric resistance of thin films of). 597. 
METAL and Saltfilms (Ultramicroscopic investigation of very thin) obtained by eva- 
poration obtained in high vacuum. 958. 
METHODS and apparatus used in the Cryogenic Laboratory. XVII. 1049. 
METHYLATED NITRO-ANILINES (On the distinction between and their nitrosamines by 
means of refractometric determinations. IL. 1098. 
METHYLBENZOL SERIES (The olfactology of the). 943. 
Microbiology. M. W. BrrsErinck: “Enzyme theory of heredity”. 1275. 
MICROVOLUMETRICAL Analysis (Contribution to). 115 
MOLECULAR CURRENTS (An experiment of MaxwELL and AMPÈRE's). 248. 
MOLECULAR REFRACTIONS (On nitroderivatives of Alkyltoluidines and their relation 
between their) and those of similar compounds. 564. 
MOLECULES (The clustering tendency of the) at the critical point. 1321. 
MOLENGRAAF (G. A. F.) presents a paper of Dr. H. A. Brouwer: “On the tectonics 
of the eastern Moluccas”. 242. 
— Coral reef problem and isostasy. 610. 
MOLL (w. 3. H.) and L. S. Ornstein. Contributions to the research of liquid 
erystals 1315. 
MOLUCCAs (On the tectonics of the eastern). 242. 
