RECENT PAPERS IN THE ‘ PHILOSOPHICAL TRANSACTIONS.’ 
Series A.—Mathematical and Physical. 
A 576. The Scattering of Plane Electric Wares by Spheres. By T. J. I’A. Bromwich, Sc.D., F.R.S. 
Pp. 32. Price 3.5. 
A 577. On the Fundamental Formulations of Electrodynamics. By G. H. Livens, University of 
Manchester. Pp. 39. Price 3s. 6 d. 
A 578. The Influence of Molecular Constitution and Temperature on Magnetic Susceptibility. 
Part IV.—Further Applications of the Molecular Field. By Major A. E. Oxley, R.A.F., 
M.A., D.Sc., Macldrmon Student of the Royal Society. Pp. 43. Price 3s. Qd. 
A 579. A Determination of the Deflection of Light by the Sun’s Gravitational Field, from Observations 
made at the Total Eclipse of May 29, 1919. By Sir F. W. Dyson, F.R.S., Astronomer Royal, 
Prof. A. S. Eddington, F.R.S., and Mr. C. Davidson. Pp. 43 ; 1 Plate, Price 4s. 6 d. 
A 580. A Critical Study of Spectral Series. Part V.—The Spectra of the Monatomic Gases. By 
W. M. Hicks, F.R.S. Pp. 134; 4 Plates. Price 8s. 
A 581. Title, Contents, Index, &c., Vol. 220. Pp. 10. Price 6d. 
Volume 220 (1920), 470 pp., with 5 Plates, Price £2 4s. 
A 582. Some Measurements of Atmospheric Turbulence. By Lewis F. Richardson. Pp. 28; 1 Plate. 
Price 3s. 6 d. 
A 583. On a Theory of the Second Order Longitudinal Spherical Aberration for a Symmetrical Optical 
System. By T. Y. Baker, B.A., Instructor Commander, R.N., and L. N. G. Filon, M.A., 
D.Sc., F.R.S., Goldsmid Professor of Applied Mathematics and Mechanics in the University 
of London. Pp. 43. Price 3s. 6 d. 
Series B. — Biological. 
B 367. The Transition from Rostro-Carinate Flint Implements to the Tongue-Shaped Implements of 
River-Terrace- Gravels. By J. Reid Moir. Pp. 22; 7 Plates. Price 6s. 6 d. 
B 368. The Development of the Sea-Anemones Metridkm JDianthus (Ellis) and Adamasi Palliata 
(Bohad). By James F. Gemmill, M.A., M.D., D.Sc, Pp. 25; 3 Plates. Price 4s. 
B 369. The Morphology and Evolution of the Ambulacrum in the Echinoidea, Holedypoida. By 
Herbert L. Hawkins, M.Sc., F.G.S., Lecturer in Geology, University College, Reading. 
Pp. 104; 9 Plates. Price 8s. Qd. 
B 370. On the Structure of Lysoropkus, as Exposed by Serial Sections. By W. J. Sollas, Sc.D., 
F.R.S., Professor of Geology in the University of Oxford. Pp. 47 ; 1 Plate. Price 7s. Qd. 
B 371. Title, Contents, Index, &c., Vol. 209. Pp. 10. Price Qd. 
Volume 209 (1920), 530 pp., with 70 Plates, Price £3 13s. 
B 372. The Respiratory Exchange of Man During and After Muscular Exercise. By J. M. H. Campbell, 
O.B.E., B.M., C. Gordon Douglas, C.M.G., M.C., D.M., Fellow of St. John’s College, Oxfor’d, 
and F. G. Hobson, D.S.O., B.M. Pp. 47. Price 5s. ' . | 
B 373. The Microscopical Features of Mechanical Strains in Timber and the Bearing of these on the 
Structure of the;;Cell-wall in Plants. By Wilfrid Robinson, D.Sc., Lecturer in Botany, 
University of Manchester. Pp. 34; 4 Plates. Price 5s. 
B 374. On a Form of Botrytis -cinerea, with Colourless Sclcrotia. By William B. Brierley (Roth- 
amsted). Pp. 31; 1 Plate. Price 4s. 
Cloth cases for binding the volumes of the ‘ Philosophical Transactions.’ Price 3s. 6 d. 
Published foe the ROYAL SOCIETY by 
Harrison and Sons, Ltd., 44-47, St. Martin’s Lane, London, W.C. 2. 
