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RECENT PAPERS IN THE ‘ PHILOSOPHICAL TRANSACTIONS,’ 
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A 430. The Diurnal Variation of Terrestrial Magnetism. By Arthur Schuster, F.R.S. Pp. 42. 
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A 431. Magnetic Declination at Kew Observatory 1890 to 1900. By C. Chree, Sc.D., LL.D., F.R.S., 
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A 432. The Effect of Hydrogen on the Discharge of Negative Electricity from Hot Platinum. By 
Professor H. A. Wilson, F.E.S., King’s College, London. Pp. 27. Price Is. 6 d. 
A 433. Report on the Eruptions of the Soufri&re in St. Vincent in 1902, and on a Visit to Montagne 
Pelee in Martinique—Part II. The Changes in the Districts and the Subsequent History 
of the Volcanoes. By Tempest Anderson, M.D., D.Sc., F.G-.S. Pp. 29; 17 Plates. 
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A 434. Petrographical Notes on the Products of the Eruptions of May, 1902, at the Soufriere in 
St. Vincent. By John S. Flett, M.A., D.Sc. Pp. 28; 2 Plates. Price 2s. 6 cl. 
A 435. The Constitution of the Electric Spark. By T. Royds, M.Sc., Beyer Fellow of the Manchester 
University. Pp. 15; 2 Plates. Price Is. 6 d. 
A 436. Thermal Radiation in Absolute Measure at Very Low Temperatures. By J. T. Bottobiley, 
M.A., LL.D., D.Sc., F.R.S., and F. A. King. Pp. 31. Price 2s. 
A 437. Bakerian Lecture. —The Effects of Temperature and Pressure on the Thermal Conductivities 
of Solids.—Part II. The Effects of Low Temperatures on the Thermal and Electrical Conduc¬ 
tivities of Certain Approximately Pure Metals and Alloys. By Charles H. Lees, D.Sc., 
F.R.S., Professor of Physics in the East London College, University of London. Pp. 63; 
2 Plates. Price 3s. 6 d. 
A 438. The Supersaturation and Nuclear Condensation of Certain Organic Vapours. By T. H. Laby, 
B.A., Emmanuel College, Cambridge, Exhibition of 1851 Scholar of the University of Sydney, 
Joule Student of the Royal Society. Pp. 30. Price 2s. 
Series B. — Biological. 
B 256. The Role 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 Palseomastodon, 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; 
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B 261. Title, Contents, Index, &c., Vol. 199. Pp. 10. Price 6 d. 
B 262. On the Distribution of the Different Arteries supplying the Human Brain. By Charles E. 
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B 263. Longitudinal Symmetry in Phanerogamia. By Percy Groom, M.A., D.Sc., F.L.S. Pp. 59. 
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B 264. Description of the Brain of Mr. Charles Babbage, F.R.S. (Hunterian Museum, Royal College 
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