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KECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS,’ 
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Series A.—Mathematical and Physical. 
A 421. On the Surface-Tension of Liquids Investigated by the Method of Jet Vibration. By 
P. 0. Pedersen. Pp. 52 ; 3 Plates. Price 3s. 
A 422. The Normal Weston Cadmium Cell. By F. E. Smith, A.R.C.Sc. (from the National Physical 
Laboratory). Pp. 28 ; 1 Plate. Price 2s. 
A 423. Electric Furnace Reactions under High Gaseous Pressures. By R. S. Hutton and J. E. Petavel. 
Pp. 42; 1 Plate. Price 2s. 6 d. 
A 424. A New Current Weigher and a Determination of the Electromotive Force of the Normal Weston 
Cadmium Cell. By W. E. Ayrton, F.R.S., and T. Mather, F.R.S., Central Technical 
College, London, and F. E. Smith, A.E.C.Sc. (National Physical Laboratory, Teddington). 
Pp. 82 ; 2 Plates. Price 5s. 
A 425. The Silver Voltameter. Part I.—By F. E. Smith, A.R.C.Sc., and T. Mather, F.R.S. Part II. 
—By F. E. Smith, A.R.C.Sc., and T. M. Lowry, D.Sc. Pp. 55; 1 Plate. Price 3s. 
A 426. Title, Contents, Index, &c., Vol. 207. Pp. 10. Price 6 d. 
A 427. Further Consideration of the Stability of the Pear-shaped Figure of a Rotating Mass of Liquid. 
By Sir G. H. Darwin, K.C.B., F.R.S., Plumian Professor of Astronomy, and Fellow of Trinity 
College, Cambridge. Pp. 19. Price Is. 
A 428. The Thermomagnetic Analysis of Meteoric and Artificial Nickel-iron Alloys. By S. W. J. Smith, 
M.A., A.R.C.S., Royal College of Science, London. Pp. 89; 2 Plates. Price 5s. 6 d. 
A 429. The Effect of Pressure upon Arc Spectra.—No. 1. Iron. By W. Geoeerey Duffield, B.Sc. 
(Adelaide), B.A. (Cantab.), Honorary Research Fellow in Physics at the Manchester University, 
Mackinnon Student of the Royal Society. Pp. 52 ; 6 Plates. Price 3s. 6 d. 
A 430. The Diurnal Variation of Terrestrial Magnetism. By Arthur Schuster, F.R.S. Pp. 42 ; 
Price 2s. 
Series B. — Biological. 
B 253. On the Julianiaceae : A New Natural Order of Plants. By W. Botting Hemsley, F.R.S., F.L.S., 
Keeper of the Herbarium and Library, Royal Botanic Gardens, Kew. Pp. 29 ; 7 Plates. 
Price 3s. 6 cl. 
B 254. Studies on the Development of Larval Nephridia. Part II.—Polygordius. By Cresswell 
Shearer, B.A., M.D., C.M., Trinity College, Cambridge. Pp. 32; 4 Plates. Price 4s. 
B 255. Cases of Colour-blindness, No. VI. to No. XVIII., together with Eleven Selected Examples of 
Normal Colour Sensations. By George J. Burch, M.A., D.Sc. Oxon, F.R.S., Lecturer in 
Physics, University College, Reading. Pp. 21. Price Is. 
B 256. The Buie of the Various Elements in the Development and Regeneration of Bone. By Sir 
William Macewen, F.R.S. Pp. 27. Price 2s. 
B 257. On the Cranial and Facial Characters of the Neandertal Race. By W. J. Sollas, Sc.D., LL.D., 
F.R.S., Professor of Geology in the University of Oxford. Pp. 59 ; 1 Plate. Price 5s. 
B 258. The Ascent of Water in Trees. By A. J. Ewart, D.Sc., Ph.D., F.L.S., Government Botanist and 
Professor of Botany in Melbourne University. Pp. 52 ; 1 Plate. Price 3s. 
B 259. On the Skull, Mandible, and Milk Dentition of Palaeomastodon, with some Remarks on the Tooth 
Change in the Proboscidea in General. By C. W. Andrews, D.Sc., F.R.S. (British Museum, 
Natural History). Pp. 15; 2 Plates. Price 2s. 6 d. 
B 260. Miadesmia Membranacea, Bertrand; a New Palaeozoic Lycopod with a Seed-like Structure. By 
Margaret Benson, D.Sc., F.L.S., Royal Holloway College, Englefield Green. Pp. 17; 
5 Plates. Price 2s. 
B 261. Title, Contents, Index, &c., Vol. 199. Pp. 10. Price 67. 
Cloth cases for binding the ‘ Philosophical Transactions ’ can be obtained of Harrison and Sons, 
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