Sold by Ddlau and Co., Ltd., 37, Soho Square, W. 
RECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS,’ 
1911-1912. 
Series A.—Mathematical and Physical. 
A 487. Physico-Chemical Determinations at High Pressures by Optical Methods. (Research executed 
in the Davy Faraday Research Laboratory of the Royal Institution of Great Britain, 
London, W.). By Walter Wahl, Ph.D., Rosenberg Research Fellow of the University of 
Helsingfors. Pp. 32. Price Is. 6d. 
A 488. A Hew Treatment of Optical Aberrations. By R. A. Sampson, F.R.S. Pp. 37. Price 2s. 
A 489. On the Variation vidth Temperature of the Rate of a Chemical Change. By A. Vernon 
Harcourt, M.A., Hon. D.Sc. Oxon, F.R.S. With an Appendix. By Willlam Esson, 
M.A., F.RS., Savilian Professor of Geometry in the University of Oxford. Pp. 18. Price Is. 
A 490. On the Emission Velocities of Photo-Electrons. By A. Ll. Hughes, M.Sc., B.A., Research 
Scholar of Emmanuel College, Cambridge. Pp. 22. Price Is. 6d. 
A 491. On the Apparent Change in Weight during Chemical Reaction. By J. J. Manley, Hon. M.A. 
Oxon, Daubeny Curator, Magdalen College, Oxford. Pp. 34. Price Is. 6d. 
A 492. Optical Rotatory Dispersion.—Part I. The Natural and Magnetic Rotatory Dispersion in -Quartz 
of Light in the Visible Region of the Spectrum. By Dr. Thomas Martin Lowry. Pp. 37. 
Price 2s. 
A 493. The Effect produced by an Obstacle on a Train of Electric Waves. By H. M. Macdonald, 
F.R.S., University of Aberdeen. Pp. 39. Pi’ice 2s. 
A 494. On the Foundations of the Theory of Algebraic Functions of One Variable. By J. C. Fields, 
Ph.D., Associate Professor of Mathematics in the University of Toronto. Pp. 35. 
Price Is. 6d. 
Series B. — Biological. 
B 294. A Metrical Analysis of Chromosome Complexes, showing Correlation of Evolutionary 
Development and Chromatin Thread-Width throughout the Animal Kingdom. By Captain 
C. F. U. Meek, M.Sc., F.L.S., F.Z.S. Pp. 74; 5 Plates. Price 5s. 
B 295. Petrifactions of the Earliest European Angiosperms. By Marie C. Stores, D.Sc., Ph.D., F.L.S., 
Fellow of University College, London. Pp. 26; 3 Plates. Price 2s. 6d. 
B 296. A Petrified Williamsonia from Scotland. By A. C. Seward, F.R.S., Cambridge. Pp. 26; 
4 Plates. Price 2s. 6d. 
B 297. The Effects of Stimulation and Extirpation of the Labyrinth of the Ear, and their Relation to 
the Motor System. Part I.—Experimental. By J. Gordon Wilson, Northwestern 
University Medical School, Chicago, and F. H. Pike, Columbia University, New York. 
Pp. 34; 4 Plates. Price 2s. 6d. 
B 298. Notes on the Life-History of TrypanosoTm gambiense, with a brief reference to the Cycles of 
Trypanosoma nanum and Trypanosoma pecorvm in Glossina palpalis. By Muriel Robertson, 
M.A. Pp. 24; 5 Plates. Price 2s. 6d. 
B 299. Physiological Observations made on Pike’s Peak, Colorado, with Special Reference to Adaptation 
to Low Barometric Pressures. By C. Gordon Douglas, B.M., Fellow of St. John’s College, 
Oxford; J. S. Haldane, M.D., LL.D., F.R.S., Fellow of New College and Reader in 
Physiology, Oxford; Yandell Henderson, Ph.D , Professor of Physiology, Yale University 
Medical School; and Edward C. Schneider, Ph.D. (Yale), Professor of Biology, Colorado 
College. Pp. 134. Price 6s. 6d. 
Cloth cases for binding the ‘ Philosophical Transactions ’ can be obtained of Harrison and Sons, 
St. Martin’s Lane. Price Is. fid. 
