CONTENTS. 
(A.) 
VOL. 178. 
I. On the Luni-Solar Variations of Magnetic Declination and Horizontal Force at 
Bombay, and of Declination at Trevandrum. By Charles Chambers, 
F.R.S., Superintendent of the Coldba Observatory, Bombay .... page 1 
II. On the Properties of Matter in the Gaseous and Liquid States under various Con¬ 
ditions of Temperature and Pressure. By the late Thomas Andrews, M.D., 
LL.D., F.R.S. Communicated by Professor Stokes, D.C.L., P.R.S. . . 45 
III. On Evaporation and Dissociation. — Part III. A Study of the Thermal Properties 
of Ethyl Oxide. By William Ramsay, Ph.D., and Sydney Young, D.Sc. 
Communicated by Professor G. G. Stokes, D.C.L., P.R.S. . 57 
IV. On the Discrimination of Maxima and Minima Solutions in the Calculus of 
Variations. By Edward P. Culverwell, M.A., Fellow and Tutor, Trinity 
College, Dublin. Communicated by Benjamin Williamson, M.A., F.R.S., 
Professor of Natural Philosophy in the University of Dublin . . . . 95 
V. On Ellipsoidal Current-Sheets. By Horace Lamb, M.A., F.R.S., Professor of 
Pure Mathematics in Owens College, Victoria University .131 
b 2 
