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RECENT PAPERS IN THE 'PHILOSOPHICAL TRANSACTIONS,' 



1902-1003. 



Scries A. — Mathematical and Physical. 



A. 334. On an Approximate Solution for the Bending of a Beam of Rectangular Cross-Section under 

 any System of Load, with Special Reference to Points of Concentrated or Discontinuous 

 Loading. By L. N. G. Filon, B.A. (Cantab.), M.A., B.Sc. (Lond.), King's College, Cambridge, 

 Fellow of University College, London, and 1851 Exhibition Science Research Scholar. 

 Price 5s. 



A. 335. On the Vibrations and Stability of a Gravitating Planet. By J. H. Jeans, B.A., Isaac Newton 



Student, and Fellow of Trinity College, Cambridge. Price Is. 6d. 

 A. 386. On the Formation of Definite Figures by the Deposition of Dust. By W. J. Russell, Ph.D., 



F.R.S. Price 2s. Gil. 



A. 337. The Spectrum of y Cygni. By Sir Norman Lockyer, K.C.B., F.R.S., and F. E. Baxandall, 



A. R.C.Sc. Price 2s. Gd. 



A. 338. Quaternions and Projective Geometry. By Professor Charles Jasper Joly, Royal 



Astronomer of Ireland. Price 5s. 

 A. 339. The Differential Invariants of a Surface, and their Geometric Significance. By A. R. Forsyth, 



M.A., Sc.D., F.R.S., Sadlerian Professor of Pure Mathematics in the University of Cambridge. 



Price 3s. Gd. 



A. 340. On the Laws Governing Electric Discharges in Gases at Low Pressures. By W. R. Carr, B.A., 



Post-Graduate Student, University of Toronto. Price 2s. 

 A. 341. On the Dependence of the Refractive Index of Gases on Temperature. By George W. Walker, 



M.A., A.R.C.S., Fellow of Trinity College, Cambridge. Price Is. Gd. 

 A. 342. Solar Eclipse of 1900, May 28. General Discussion of Spectroscopic Results. By J. Evershkd, 



F.R.A.S. Price 3s. 



A. 343. The Electrical Conductivity imparted to a Vacuum by Hot Conductors. By O. W. Richardson, 



B. A., B.Sc, Fellow of Trinity College, Cambridge. Price 3s. Gd. 



Series B. — Biological. 



B. 210. The Structure and Development of the Stem in the Pteridophyta and Gymnosperms. By 



Edward C. Jeffrey, Ph.D. (Harvard). Price 3s. 

 B. 211. On the Structure of the Gills of the Lamellibranchia. By W. G. Ridewood, D.Sc., F.L.S., 



Lecturer on Biology at the Medical School of St. Mary's Hospital, London. Price 9s, Qd. 

 B. 212. The Development of Echinus esculentus, together with some Points in the Development of 



E. milmrus and E. actitus. By E. W. MacBride, M.A., D.Sc. (Lond.), sometime Fellow of 



St. John's College, Cambridge, Stratheona Professor of Zoology in the McGill University, 



Montreal. Price 8s. Gd. 

 B. 213. Title, Contents, Index, &c., Vol. 195. Price Gd. 



B. 214. The Seed-fungus of LoUtm UninUidum, L., the Darnel. By E. M. Freeman, M.S., University of 

 Minnesota. Price 3s. 



B. 215. On the Histology of Uredo Dispersa, Erikss., and the " Mycoplasm " Hypothesis." By 

 H. Marshall Ward, Sc.D., F.R.S., Professor of Botany in the University of Cambridge. 

 Price 3s. 



B. 216. The Uistrous Cycle and the Formation of the Corpus Luteum in the Sheep. By Francis H. A. 

 Marshall, B.A. Price 4s. 



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