432 
INDEX. 
L. 
Lightning discharges and electric field of thunderstorms (Wilson), 73. 
Lock (C. N. H.). See Fowler and others. 
M. 
Metals, elastic properties and plastic extension of (Dalby), 117. 
Microphone, selectiTe hot-wire (Tucker and Pabis), 389. 
N. 
Nitro-cellulose, stress-strain properties and optical behaviour (Cokeb. and Chakko), 139. 
O. 
Optical system, longitudinal spherical aberration for symmetrical (Baker and Filon), 29. 
Paris (E. T.). See Tucker and Paris. 
P. 
E. 
Richardson (L. F ). Some Measurements of Atmospheric Turbulence, 1. 
Richmond (H. W.). See Fowler and others. 
Rupture and flow in solids (G-riefith), 163. 
S. 
Shell, aerodynamics of spinning (Fowler and others), 295. 
Sheppard (W. F.). Reduction of Error by Linear Compounding, 199. 
Stress and strain in bipolar co-ordinates (Jeffery), 265. 
T. 
Thunderstorms, electric field of (Wilson), 73. 
Tidal friction in shallow seas (Jeffreys), 239. 
Tucker (W. S.) and Paris (E. T.). A Selective Hot-Wire Microphone, 389. 
W. 
Wilson (C. T. R.). Investigations on Lightning Discharges and on the Electric Field of Thunderstorms, 73. 
HARRISON AND SONS, LTD., PRINTERS IN ORDINARY TO HIS MAJESTY, ST. MARTIN’S LANE, W.C. 2. 
