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RECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS,’ 
1905-1906. 
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Series A.—Mathematical and Physical. 
Fifth and Sixth Catalogues of the Comparative Brightness of the Stars—in Continuation of 
those Printed in the -‘Philosophical Transactions of the Royal Society’ for 1796-99. By 
Dr. Herschel, LL.D., F.R.S., Prepared for Press from the Original MS. Records by 
Col. J. Herschel, R.E., F.R.S. Pp. 49. Price 2s. 
On the Accurate Measurement of Ionic Velocities, with Applications to Various Ions. By 
R. B. Denison, M.Sc., Ph.D., and B. D. Steele, D.Sc. Pp. 16. Price Is. 
On Mathematical Concepts of the Material World. By A. N. Whitehead, Sc.D., F.R.S., 
Fellow of Trinity College, Cambridge. Pp. 61. Price 2s. 6 cl. 
Title, Contents, Index, &c., Vol. 205. Pp. 10. Price 6 d. 
The Combination of Hydrogen and Oxygen in Contact with Hot Surfaces. By William 
Arthur Bone, Ph.D., D.Sc., F.R.S., late Bishop Berkeley Fellow of Owens College, 
Manchester, and Fellow of Victoria University, and Richard Vernon Wheeler, B.Sc., 
Dalton Scholar and Fellow of Manchester University. Pp. 67. Price 3s. 
On the Periodicities of Sunspots. By Arthur Schuster, F.R.S. Pp. 32. Price Is. 6 cl. 
Ionic Size in Relation to the Physical Properties of Aqueous Solutions. By W. R. Bousfield, 
M.A., K.C. Pp. 59. Price 3s. 
On the Figure and Stability of a Liquid Satellite. By Sir G. H. Darwin, K.C.B., F.R.S., 
Plumian Professor and Fellow of Trinity College, Cambridge. Pp. 88. Price 4s. 
The Asymptotic Expansion of Integral Functions defined by Taylor’s Series. By E. W. Barnes, 
M.A., Fellow of Trinity College, Cambridge. Pp. 49. Price 2s. 
A Discussion of Atmospheric Electric Potential Results at Kew from Selected Days during the 
Seven Years 1898 to 1904. By C. Chree, Sc.D., LL.D., F.R.S. Pp. 36. Price Is. 6 d. 
Galvanic Cells Produced by the Action of Light.—The Chemical Statics and Dynamics of 
Reversible and Irreversible Systems under the Influence of Light. (Second Communication.) 
By Meyer Wilderbian, Ph.D., B.Sc. (Qxon). Pp. 67; 8 Plates. Price 3s. 6 cl. 
Series B. — Biological. 
On Endophytic Adaptation shown by Erysiphe graminis DC. under Cultural Conditions. By 
Ernest S. Salmon, F.L.S. Pp. 11; 1 Plate. Price Is. 
Contributions to the Physiology of Mammalian Reproduction.-—Part I. The CEstrous Cycle in 
the Dog. Part II. The Ovary as an Organ of Internal Secretion. By Francis H. A. 
Marshall, Carnegie Fellow in the University of Edinburgh; and William A. Jolly, 
Assistant to the Professor of Physiology in the University of Edinburgh. Pp. 43; 2 Plates. 
Price 5s. 
The Morphology of the Ungulate Placenta, particularly the Development of that Organ in the 
Sheep, and Notes upon the Placenta of the Elephant and Hyrax. By Richard Assheton, 
M.A., Lecturer on Biology in the Medical School of Guy’s Hospital, University of London. 
Pp. 78; 5 Plates. Price 7s. 6 d. 
Further Experiments and Histological Investigations on Intumescences, with some Observations 
on Nuclear Division in Pathological Tissues. By Miss E. Dale. Pp. 43; 4 Plates. Price 4s. 
Some Observations on WelwitscMci mirabilis, Hooker,/. By H. H. W. Pearson, M.A., F.L.S., 
Professor of Botany in the South African College, Capetown; sometime Scholar of Christ’s 
College, Frank Smart Student of Gonville and Caius College, Cambridge, and Assistant in the 
Royal Gardens, Kew. Pp. 40; 5 Plates. Price 4s. Qd. 
The Araueariese, Recent and Extinct. By A. C. Seward, F.R.S., Fellow of Emmanuel College, 
and Sibille O. Ford, formerly Bathurst Student of Newnham College, Cambridge. Pp. 107; 
2 Plates. Price 5s. 6d. 
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