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EECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS,’ 
1915-16. 
Series A.—Mathematical and Physical. 
A 534. Thermal Properties of Carbonic Acid at Low Temperatures. (Second Paper.) By C. Frewen 
Jenkin, M.A., M.Inst.C.E., Professor of Engineering Science, Oxford, and D. R. Pye, M.A., 
Fellow of New College, Oxford. Pp. 29 ; 1 Plate. Price 2s. 
A 535. On the Specific Heat of Steam at Atmospheric Pressure between 104° C. and 115° C. 
(Experiments by the Continuous Flow Method of Calorimetry Performed in the Physical 
Laboratory of the Royal College of Science, London.) By J. H. Brinkworth, A.R.C.S., 
B.Sc., Lecturer in Physics at St. Thomas’s Hospital Medical School. With a Preface by 
Prof. H. L. Callendar, M.A., LL.D., F.R.S., Professor of Physics at the Imperial College of 
Science and Technology, London, S.W. Pp. 56. Price 3s. 
A 536. Some Applications of Conformal Transformation to Problems in Hydrodynamics. By 
J. G. Leathem, M.A., D.Sc. Pp. 49. Price 2s. 6d. 
A 537. Title, Contents, Index, &c., Vol. 215. Pp. 10. Price 6d. 
A 538. The Monoclinic Double Sulphates Containing Ammonium, Completion of the Double Sulphate 
Series. By A. E. H. Tutton, D.Sc., M.A., F.R.S., President of the Mineralogical Society. 
Pp. 62. Price 3s. 
A 539. The Electrical Conductivity and Luminosity of Flames Containing Salt Vapours. By H. A. 
Wilson, F.R.S., Professor of Physics, Rice Institute, Houston, Texas, U.S.A. Pp. 28. 
Price Is. 6d. 
A 540. The Threshold of Vision for Different Coloured Lights. By Sir W. de W. Abney, K.C.B., 
D.C.L., D.Sc., F.R.S., and Prof. W. Watson, D.Sc., F.R.S. Pp. 38. Price 3s. 
A 541. On Certain Linear Differential Equations of Astronomical Interest. By Prof. H. F. Baker, 
F.R.S. Pp. 58. Price 3s. 
Series B. — Biological. 
B 335. The Development of the Thymus, Epithelial Bodies, and Thyroid iu the Marsupialia. 
Part I. — Trichosurus vulpecula. By Miss E. A. Fraser, B.Sc. (Lond.), and Prof. J. P. Hill, 
D.Sc., F.R.S. Pp. 85 ; 10 Plates. Price 7s. Qd. 
B 336. The Development of the Thymus, Epithelial Bodies, and Thyroid in the Marsupialia. 
Part II.— Phascolardos, Phascolomys, and Perameles. By Miss E. A. Fraser, B.Sc. (Lond.). 
Pp. 26 j 1 Plate. Price 2s. 
B 337. On TVilliamsoniella, a New Type of Bennettitalean Flower. By H. Hamshaw Thomas, M.A., 
F.G.S., Fellow of Downing College, Cambridge, and Curator of the Cambridge Botanical 
Museum. Pp. 36; 3 Plates. Price 3s. 
B 338. Effects of Functional Activity in Striated Muscle and the Submaxillary Gland. By Joseph 
Barcroet, F.R.S., and Toyojiko Kato. Pp. 34. Price 2s. 6d. 
B 339. The Measurement of the Rate of Heat-Loss at Body Temperature by Convection, Radiation, and 
Evaporation. By Leonard Hill, F.R.S., O. W. Griffith, and Martin Flack. (From 
the Department of Applied Physiology, Medical Research Committee.) Pp. 38. Price 3s. 
B 340. The Spread of the Excitatory Process in the Vertebrate Heart. Parts I-V. By Thomas Lewis. 
Pp. 90; 8 Plates. Price 6s. 6 d. 
B 341. The Monotreme Skull: A Contribution to Mammalian Morphogenesis. By D. M. S. Watson, 
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