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EECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS,’ 
1902-1903. 
Series A.—Mathematical and Fhysical, 
A 334. On an Approximate Solution for the Bending of a Beam of Eectangular 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 1«. 6d. 
A. 336. On the Formation of Definite Figures by the Deposition of Dust. By W. J. Russell, Ph.D., 
F.R.S. Price 2s. 6d. 
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, 6d. 
A. 338. Quaternions and Projective GeometrjL By Professor Charles Jasper Joly, Royal 
Astronomer of Ireland. Price 5.s. 
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. 6d. 
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.Sc., Fellow of Trinity College, Cambridge. Price Ls. 6d. 
Series B. — Biological. 
B. 209. The Pharmacology of Pyraconitine and Methyl-Benzaconine considered in Relation to their 
Chemical Constitution. By J. Theodore Cash, M.D., F.R.S., Regius Professor of Materia 
Medica in the University of Aberdeen, and Wyndham R. Dunstan, M.A., F.R.S., Director 
of the Scientific and Technical Department of the Imperial Institute. Price Is. 
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. 6(7. 
B. 212. The Development of Echinus Esculentus, together with some Points in the Development of 
E. Milmris and E. Acuhis. By E. W. MacBride, M.A., D.Sc. (Lond.), sometime Fellow of 
St. John’s College, Cambridge; Strathcona Professor of Zoology in the McGill University, 
Montreal. Price 8s. Qd. 
B. 213. Title, Contents, Index, &c., Vol. 195. Price 6(7. 
B. 214. The Seed-Fungus of LoHum Temulentum, L., the Darnel. By E. M. Freeman, M.S., University 
of Minnesota. Price 3s. 
B. 215. On the Histology of Uredo disperse, Erikss., and the “Mycoplasm” Hypothesis. By 
H. Marshall Ward, Sc.D., F.R.S., Professor of Botany in the University of Cambridge. 
Pi’ice 3s. 
B. 216. The OEstrous Cycle and the Formation of the Corpus Luteum in the Sheep. By Francis H. A. 
Marshall, B.A. Price 4s. 
Cloth cases for binding the ‘Philosophical Transactions’ can be obtained of Harrison and Sons, 
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