XVI CAO PNA atime S 
ORTHOGONAL SYSTEMS (On z-tuple) of #—1-dimensional manifolds in a general 
manifold of 2 dimensions. 594. II. 684. 
Os (C. H. van). An involution of pairs of points and an involution of 
pairs of rays in space. 580. 
Pairs OF POINTS (An involution of) and an involution of pairs of rays 
in space. 580. 
Palaentology. J. WANNER: “Ueber einige palaeozoische Seeigelstacheln 
(Timorocidaris gen. nov. und Bolboporites Pander).” 696. 
— FERNAND MEUNIER: “Quelques insectes de lAquitanien pe Rott, 
Sept-Monts (Prusse rhénane).” 727. 891. 
PERMEABILITY (Further Researches in connection with the) of the glomerular 
membrane to stereoisomeric sugars. 351. 
— (The partial) of the glomerular membrane to d-galactose and some 
other multi-rotatory sugars. 360. 
PHOTO-GROWTH reaction and disposition to light in Avena sativa. 57. 
PHYLOGENY (On the) of the hair of mammals. 140. 
Physics. H. Groot: “On the Effective Temperature of the Sun.” 89. II. 615. 
— C. A. CROMMELIN, J. PALACIOs MARTINEZ and H. KAMERLINGH ONNES: 
“Tsothermals of monatomic substances and their binary mixtures. XX. 
Isothermals of neon from + 20° G. to — 217° CG.” 108. 
— G. Norpstrém: “Note on the circumstance that an electric charge 
moving in accordance with quantum-conditions does not radiate.” 145. 
— T. vAN LOHUIZEN: “The Anomalous ZEEMAN-Effect.” 190. 
— K. F. Niessen: “A Theory of a Method for the Derivation of the 
Distribution of Energy in a ‘Narrow Spectrum Region from the Distri- 
bution of Energy, Observed in an Interferometer.” 200. 
— P. A. vAN DER Harst: “Researches on the Spectra of Tin, Lead, 
Antimony, and Bismuth in the Magnetic Field.” 300. 
— P. ZEEMAN: “The Propagation of Light in Moving Transparent Solid 
Substances. I. Apparatus for the Observation of the Frizeau-Effect in 
Solid Substances.” 462. 
— P. ZEEMAN and Miss A. SNETHLAGE: “The Propagation of Light in 
Moving, Transparent, Solid Substances. II]. Measurements on the 
Fizeau-Effect in Quartz.” 512. 
— D. Coster: “On the rings of connecting-electrons in BRAGG’s model 
of the diamondcrystal.” 536. 
— A. D. Fokker: “The Contributions from the Polarization and Magneti- 
zation Electrons to the Electric Current.” 850. 
Physiology. F. Roers and L. Morr: “On the Index Loquelae.” 98. 
— H. ZwaarRDEMAKER and H. ZEEHUISEN: “On the relation between the 
electrical phenomenon in cloudlike condensed odorous water vapours 
and smell-intensity.” 175 
