680 CLASSIFIED CONTENTS OF VOLUMES I—VI V. HYDRODYNAMICS—continued. PAGK Further Calculations concerning the Momentum of Progressive Waves. Art. 383. 1914........Vol. YI 232 Fluid Motions. Art. 384. 1914...... ,,237 On the Theory of Long Waves and Bores. Art. 385. 1914 . „ 250 Experimental .......... „ 254 The Equilibrium of Revolving Liquid under Capillary Force. Art. 387. 1914........ ,,257 Further Remarks on the Stability of Viscous Fluid Motion. Art. 388. 1914......... „ 266 Note on the Formula for the Gradient Wind. Art. 389. 1915 . „ 276 The Principle of Similitude. Art. 392. 1915 .... „ 300 Deep Water Waves, Progressive or Stationary, to the Third Order of Approximation. Art. 393. 1915. ... „ 806 ^Eolian Tones. Arb. 394. 1915......„ 315 On the Resistance experienced by Small Plates exposed to a Stream of Fluid. Art. 395. 1915 . . . . ,,326 Hydrodynamical Problems suggested by Pitot's Tubes. Art. 396. 1915.........,,329 On the Stability of the Simple Shearing Motion of a Viscous Incompressible Fluid. Art. 398. 1915 . . . ,,341 Lamb's Hydrodynamics. Art. 406. 1916.....„ 400 On the Flow of Compressible Fluid past an Obstacle. Art. 407. 1916........... ,,402 On the Discharge of'Gases under High Pressures. Art. 408. 1916. ..'..,...... „ 407 On Convection Currents in a Horizontal Layer of Fluid, when the Higher Temperature is on the Uncler Side. Art. 412. 1916...........,,432 Appendix [Nearly Symmetrical Solution for a nearly Circular Area]..........„ 444 On the Dynamics of Revolving Fluids. Art. 413. 1916 . . „ 447 On Periodic Irrotational Waves at the Surface of Deep Water. Art. 419. 1917.........,,478 On the Suggested Analogy between the Conduction of Heat and Momentum during the Turbulent Motion of a Fluid. Art. 420. 1917.........,,486 On the Pressure developed in a Liquid during the Collapse of a Spherical Cavity. Art. 423. 1917 . . . . „ 504 A Simple Problem in Forced Lubrication. Art. 426. 1917 . „ 514 Notes on the Theory of Lubrication. Art. 428. 1918 . . „ 523 A Proposed Hydraulic Experiment. Art. 433. 1918 . . „ 552 On the Possible Disturbance of a Range-Finder by Atmospheric Refraction due to the Motion of the Ship which carries it. Art. 439. 1919 ,. . . . . . 597........ ,,153