VIII. The Effect of Pressure upon Arc Spectra. No. 5. Nickel, \ 3450 to \ 5500, 

 including an Account of the Rate of Displacement with Wave-length, of the 

 Relation between the Pressure and the Displacement, of the Influence of the 

 Density of the Material and of the Intensity of the Spectrum Lines upon 

 the Displacement, and of the Resolution of the Nickel Spectrum into Groups 

 of Lines. By W. GEOFFREY DUFFIELD, D.Sc., Professor of Physics, and 

 Dean of the Faculty of Science in University College, Reading. Communi- 

 cated by Prof. A. SCHUSTER, Sec. R.S. .......... page 205 



IX. BAKERIAN LECTURE. X-rays and Crystal Structure. By W. H. BRAGG, D.Sc., 



F.R.S., Cavendish Professor of Physics in the University of Leeds . . 253 



X. Gaseous Combustion at High Pressures. By WILLIAM ARTHUR BONE, D.Sc. 



Ph.D., F.R.S., formerly Livesey Professor of Coal Gas and Fuel Industries 

 at the University of Leeds, now Professor of Chemical Technology at the 

 Imperial College of Science and Technology, London, in collaboration with 

 HAMILTON DATIES, B.Sc., H. H. GRAY, B.Sc., HERBERT H. HENSTOCK, 

 M.Sc., Ph.D., and J. B. DAWSON, B.Sc., formerly of the Fuel Department in 

 the University of Leeds ................. 275 



XL Heats of Dilution, of Concentrated Solutions. By WM. S. TUCKER, A.R.C.Sc., 

 B.Sc. Communicated by Prof. H. L. CALLENDAR, F.R.S. ..... 319 



XII. 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., Felloiv of Neiv College, Oxford. Communicated 

 by Sir ALFRED EWING, K.C. B., F.R. S. ........... 353 



XIII. 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. Preface by H. L. CALLENDAR, 

 M.A., LL.D., F.R.S., Professor of Physics at the Imperial College of Science 

 and Technology, London, S.W. ............. 383 



XIV. Some Applications of Conformal Transformation to Problems in Hydro- 



dynamics. By J. G. LEATHEM, M.A., D.Sc. Communicated by Sir JOSEPH 

 LARMOR, M.P., F.R.S. ................. 439 



Index to Volume 



