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RECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS/ 
1916-17. 
Series A.—Mathematical and Physical. 
A 547. On the Distribution of Intensity in Broadened Spectrum Lines. By J. W. Nicholson, M.A, 
D.Sc., Professor of Mathematics in the University of London, and T. R. Merton, D.Sc. (Oxon), 
Lecturer in Spectroscopy in the University of London, Bang’s College. Pp. 30; 1 Plate. 
Price 2s. 
A 548. Title, Contents, Index, &c., Yol. 216. Pp. 10. Price 6 d. 
A 549. On the Instability of the Pear-shaped Figure of Equilibrium of a Rotating Mass of Liquid. By 
J. H. Jeans, M.A., F.R.S. Pp. 34. Price Is. 6 d. 
A 550. On Periodic Disturbance of Level Arising from the Load of Neighbouring Oceanic Tides. By 
K. Terazawa, Ri-Gakushi of the Imperial University of Tokyo. Pp. 16. Price Is. 
A 551. The Genesis of Pleochroic Haloes. By J. Joly, Sc.D., F.R.S., Professor of Geology and 
Mineralogy in the University of Dublin. Pp. 29; 1 Plate. Price 2s. 
A 552. Seventh Memoir on the Partition of Numbers. A Detailed Study of the Enumeration of the 
Partitions of Multipartite Numbers. By Major P. A. MacMahon, R.A., D.Sc., Sc.D., F.R.S. 
Pp. 33. Price 2s. 
A 553. On the Kinetic Theory of a Gas. Part II.— A Composite Monatomic Gas: Diffusion, Viscosity, 
and Thermal Conduction. By S. Chapman, M.A., D.Sc., Fellow and Lecturer of Trinity 
College, Cambridge. Pp. 83. Price 4s. 
A 554. Monoclinic Double Selenates of the Nickel Group. By A. E. H. Tutton, D.Sc., M.A., F.R.S. 
Pp. 37. Price 2s. 
A 555. On Phenomena Relating to the Spectra of Hydrogen and Helium. By T. R. Merton, D.Sc. 
(Oxon), Lecturer in Spectroscopy, University of London, King’s College, and J. W. Nicholson, 
M.A., D.Sc., Professor of Mathematics in the University of London. Pp. 42; 2 Plates. 
Price 2s. 6 cl. 
Series B. — Biological. 
B 346. On the Structure of the Dicynodont Skull. By Igerna B. J. Sollas and W. J. Sollas, F.R.S. 
Pp. 9 ; 2 Plates. Price Is. 6 d. 
B 347. Title, Contents, Index, &c., Yol. 207. Pp. 10. Price 6 d. 
B 348. On the Action of Cobra Yenom. Parts I and II. By Arthur R Cushny, F.R.S., and S. Yagi. 
Pp. 36. Price 2s. 
B 349. The Convolutional Pattern of the Brains of Identical Twins: a Study on Hereditary 
Resemblance in the Furrows of the Cerebral Hemispheres. By F. Sano, M.D. (Brussels), 
Physician in Chief to the Asylum for Acute Mental Cases at Antwerp (Belgium). Pp. 25. 
Price Is. 6 d. 
B 350. The Skull of Ichthyosaurus, Studied in Serial Sections. By W. J. Sollas, F.RS., Professor of 
Geology in the University of Oxford. Pp. 64; 1 Plate. Price 4s. 
B 351. On the Fossil Floras of the Coal Measures of South Staffordshire. By E. A. Newell Arber, 
M.A., Sc.D., F.G.S., Trinity College, Cambridge, University Demonstrator in Palseobotanv. 
Pp. 29; 3 Plates. Price 2s. 6 d. 
B 352. Analyses of Agricultural Yield. Part III.—The Influence of Natural Environmental Factors 
upon the Yield of Egyptian Cotton. By W. Lawrence Balls, Sc.D., late Fellow of 
St. John’s College, Cambridge. Pp. 67. Price 5s. 
B 353. An Investigation into the Periodicity of Measles Epidemics in London from 1703 to the Present 
Day by the Method of the Periodogram. By John Brownlee, M.D., D.Sc. Pp. 26. 
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