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RECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS’ 
1916-17. 
Series A.—Mathematical and Physical. 
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, B.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 d. t 
A 556. Numerical Results of the Theory of the Diffraction of a Plane Electromagnetic Wave by a 
Perfectly Conducting Sphere. By J. Proudman, A. T. Doodson, and G. Kennedy. Pp. 36. 
Price 3s. 
A 557. Bakerian Lecture.— On X-Rays and the Theory of Radiation. By C. G. Barela, F.R.S., 
Professor of Natural Philosophy in the University of Edinburgh Pp. 46. Price 3s. 
A 558. \ A Critical Study of Spectral Series. Part IV.—The Structure of Spark Spectra. By 
W. M. Hicks, F.R.S. Pp. 50; 15 Plates. Price 3s. 6d. 
X . 
Series B .— Biological. 
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.R.S., 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 Palseobotany. 
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. 
Price 2s. 
B 354. On the Structure and Development of the Tubular Enamel of the Sparidse and Labridfe. By 
J. Howard Mummery, D.Sc. (Hon.), Penn., M.R.C.S. Pp. 19; 2 Plates. Price 2s. 
B 355. The Cytomorphosis of the Marsupial Enamel-Organ and its Significance in Relation to the 
Structure of the Completed Enamel. By J. Thornton Carter. Pp. 35; 4 Plates. 
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