[ iv ] 
Y. The Analysis of Sound .— Part I. The Experimental Analysis of Sound in Air 
and Water: Some Experiments towards a Sound Spectrum. By Guy 
Barlow, D.Sc. (Wales, Bond., Birm.), F.Inst.P., Lecturer in Physics in the 
University of Birmingham , and H. B. Keene, D.Sc. (Birm.), F.Inst.P., 
Lecturer in Physics in the University of Birmingham. Part II. The Theory 
of Analysis of an Electric Current by Periodic Interruption. By G. Barlow, 
D.Sc. Communicated by Sir Oliver Lodge, F.R.S. . page 131 
VI. Lagrange’s Ballistic Problem. By A. E. H. Love, F.R.S., Sedleian Professor 
of Natural Philosophy in the University of Oxford, and F. B. Pidduck, M.A., 
Fellow of Queens College, Oxford . 167 
VII. The Aerodynamics of a Spinning Shell. — Part II. By B. H. Fowler and 
C. N. H. Lock. Communicated by H. W. Richmond, F.R.S. .... 227 
VIII. Bakerian Lecture. —Optical Rotatory Dispersion .— Part II. Tartaric Acid 
and the Tartrates. By Thomas Martin Lowry, F.R.S., and Percy Corlett 
Austin.249 
IX. On the Mathematical Foundations of Theoretical Statistics. By R. A. Fisher, 
M.A., Fellow of Gonville and Caius College, Cambridge, Chief Statistician, 
Rothamsted Experimental Station, Harpenden. Communicated by Dr. E. J. 
Russell, F.R.S . 309 
X. Bakerian Lecture. — On the Spectrum of Hydrogen. By T. R. Merton, D.Sc., 
F.R.S., Professor of Spectroscopy in the University of Oxford, and 
S. Barratt, B.A., Balliol College, Oxford . 369 
Index to Volume 
401 
