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RECENT PAPERS IN THE ‘ PHILOSOPHICAL TRANSACTIONS,’ 
1903. 
Series A.—Mathematical and Physical. 
A. 349. The Elasmometer, a New Interferential Form of Elasticity Apparatus. By A. E. H. Tutton, 
D.Sc., E.E.S. Price Is. Qd. 
A. 350. The Mechanical Forces Acting on a Charged Electric Condenser Moving through Space. By 
F. T. Trouton, F.E.S., and H. E. Noble, B.Sc., University College, London. Price Is. 
A. 351. The Spectra of Neon, Krypton and Xenon. By E. C. C. Baly, Lectiuer on Spectroscopy in 
University College, London. Price 3s. 
A. 352. On the Discharge of Electricity from Hot Platinum. By Harold A. WiLSON, D.Sc., B.A., 
Fellow of Trinity College, Cambridge. Price Is. Qd. 
A. 353. The Differential Invariants of Space. By A. E. Eorsyth, Sc.D., LL.D., F.E.S., Sadlerian 
Professor of Pure Mathematics in the University of Cambridge. Price 3s. 
A. 354. An Analysis of the Eesults from the Kew Magnetographs on “ Quiet ” Days during the Eleven 
Years 1890 to 1900, vdth a Discussion of Certain Phenomena in the Absolute Observations. 
By Charles Chree, Sc.D., LL.D., E.E.S., Superintendent of the Observatory Department of 
the National Physical Laboratory. Price 6s. 
A. 355. On the Photo-Electric Discharge from Metallic Surfaces in Different Gases. By W. Mansergh 
Varley, M.Sc. (Viet.), Ph.D. (Strasbui’g), B.A. (Cantab.), late 1851 Exhibition Eesearch 
Scholar, Emmanuel College, Cambridge; Assistant Professor of Physics and Electrical 
Engineering, Heriot-Watt College, Edinburgh. Price Is. 6d. 
A. 356. An Enquiry into the Variation of Angles observed in Crystals; especially of Potassium-alum 
and Ammonium-alum. By Henry A. IMiers, D.Sc., M.A., F.E.S., V.P.G.S., \ .P.C.S.> 
Waynflete Professor of Mineralogy in the University of Oxford. Price 3s. 6d. 
Series B. — Biological. 
B. 214. The Seed-Fungus of Lolium Temvlentum, L., the Darnel. By E. M. Freeman, M.S., Univeisity 
of Minnesota. Price 3s. 
B. 215. On the Histology of Uredo dispersa, Erikss., and the “Mycoplasm” Hypothesis. By 
H. Marshall Ward, Sc.D., F.E.S., Professor of Botany in the University of Cambridge. 
Price 3s. 
B. 216. The (Estrous Cycle and the Formation of the Corpus Luteum in the Sheep. By Francis H. A. 
Marshall, B.A. Price 4s. 
B. 217. On the Evolution of the Proboscidea. By C. W. Andrews, D.Sc., F.G.S., British Museum 
(Natural History). Price Is. 
B. 218. Experiments in Hybridization, with Special Deference to the Effect of Conditions on Dominance. 
By Leonard Doncaster, B.A., King’s College, Cambridge. Price 3s. 
B. 219. On Eeptilian Eemains from the Trias of Elgin. By G. A. Boulenger, F.E.S. Price 3s. 6f7. 
B. 220. Studies in the hlorphology of Spore-producing Members. No. V.—General Comparisons and 
Conclusion. By F. 0. Bower, Sc.D., F.E.S., Eegius Professor of Botany at the University of 
Glasgow. Price 2s. 6d. 
B. 221. A Method for the Investigation of Fossils by Serial Sections. By W. J. SOLLAS, D.Sc., LL.D., 
F.E.S., Professor of Geology and Palaeontology in the University of Oxford. Price Is. 
B. 222. An Account of the Devonian Fish, Palosospondylus Gunni, Traquair. By W. J. SoLLAS, D.Sc., 
LL.D., F.E.S., Professor of Geology and Palaeontology in the University of Oxford, and 
Igerna B. j. Sollas, B.Sc., Lecturer on Zoology in Newnham College, Cambridge. Price 2s. 
Cloth cases for binding the ‘ Philosophical Transactions ’ can be obtained of Harrison and Sons, 
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