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RECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS,’ 
1913. 
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Series A.—Mathematical and Physical . 
On the Self-inductance of Circular Coils of Rectangular Section. By T. R. Lyle, M.A., Sc.D., 
F.R.S. Pp. 15. Price Is. 
A Method of Measuring the Pressure Produced in the Detonation of High Explosives or by the 
Impact of Bullets. By Bertram Hopkinson, F.R.S. Pp. 20. Price Is. 6 d. 
Gravitational Instability and the Nebular Hypothesis. By J. H. Jeans, M.A., F.R.S. Pp. 29. 
Price Is, 6 cl. 
Title, Contents, Index, &c., Yol. 213. Pp. 8. Price 6 d. 
The Preparation of Eye-preserving Glass for Spectacles. By Sir William Crookes, O.M., F.R.S. 
Pp. 25. Price Is. Qd. 
Absolute Measurements of a Resistance by a Method Based on that of Lorenz. By F. E. 
Smith, A.R.C.Sc. (From the National Physical Laboratory.) Pp. 82. Price 4s. 6 d . 
The Influence of Molecular Constitution and Temperature of Magnetic Susceptibility. By 
A. E. Oxley, B.A., M.Sc., Coutts Trotter Student, Trinity College, Cambridge. Pp. 38. 
Price 3s. 
A Determination of the Electromotive Force of the Weston Normal Cell in Semi-absolute Yolts. 
By A. Norman Shaw, M.Sc., 1851 Exhibitioner, and King Research Fellow, McGill 
University, Montreal. With a Preface by Prof. H. L. Callendar, F.R.S. Pp. 52; 2 Plates. 
Price 3s. 
Similarity of Motion in Relation to the Surface Friction of Fluids. By T. E. Stanton and 
J. R. Pannell. (From the National Physical Laboratory). Pp. 26. Price 2s. 
Series B. — Biological. 
On the Fossil Floras of the Wyre Forest, with Special Reference to the Geology of the Coalfield 
and its Relationships to the Neighbouring Coal Measure Areas. By E. A. Newell Arber, 
M.A., Sc.D., F.G.S., F.L.S., Trinity College, Cambridge, University Demonstrator in Palseo- 
botany. Pp. 83; 4 Plates. Price 4s. 6 d. 
Title, Contents, Index, &c., Vol. 204. Pp. 10. Price 6 d. 
On Dimensions of Chromosomes considered in Relation to Phylogeny. By J. Bretland 
Farmer, F.R.S., and L. Digby. Pp. 25; 2 Plates. Price 3s. 
Experiments on the Restoration of Paralysed Muscles by Means of Nerve Anastomosis. By 
Robert Kennedy, M.A., D.Sc., M.D., St. Mungo Professor of Surgery in the University of 
Glasgow. Pp. 50; 2 Plates. Price 3s. 
Some Notes on Soil Protozoa. By C. H. Martin, M.A., and K. R. Lewin, B.A., Rothamsted 
Experimental Station. Pp. 18; 2 Plates. Price 3s. 
On the Process of Calcification in Enamel and Dentine. By J. Howard Mummery, M.R.C.S., 
L.D.S. Pp. 19; 2 Plates. Price 2s. 
On the Floral Mechanism of JVelswitchia mirabilw (Hooker). By A. H. Church, M.A., D.Sc., 
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The Chromaffine System of Annelids and the Relation of this System to the Contractile Yascular 
System in the Leech, Hirudo medicinalis. A Contribution to the Comparative Physiology of 
the Contractile Yascular System and its Regulators, the Adrenalin Secreting System and the 
Sympathetic Nervous System. By J. F. Gaskell, M.A., M.D., F.R.C.P., D.P.H., Beit 
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