exces] 
VIL. On the Spectra of Argon. By Witutam Crookes, F.R.S., de. . . page 243 
VII. The Inquefaction and Solidification of Argon. By Dr. K. OtszEwsx1, Pro- 
fessor of Chemistry in the University of Cracow. Communicated by Professor 
WiinietaM RAMSAY, oh ReS. Se a ee con | eee 
IX. The Latent Heat of Evaporation of Water. By E. H. Grirritrus, I.A., 
HeGe Sussex ee Cambridge. Communicated by R. T. GLAZEBROOK, 
X. Contributions to the Mathematical Theory of Evolution.—Il. Skew Variation im 
Homogeneous Material. By Karu Pearson, University College, London. 
Communicated by Professor HENRICI, HohaS. 9). 22) ee 
XI. A Determination of the Specific Heat of Water in Terms of the International 
Electric Units. By Artuur Scauster, F.R.S., Langworthy Professor of 
Physics at the Owens College, Manchester, and Witit1am Gannon, J.A., 
Exhibition (1851) Scholar, Queen’s College, Galway . . . . . . . 415 
XII. The Oscillations of a Rotating Ellipsoidal Shell containing Fluid. By S. 8. 
Hoven, B.A., St. John’s Rees Cambridge. Communicated by Sir RoBEert 
jam, wee . . k Mr ee ese gio | ED) 
XIII. On the Velocities of the Ions. By W.C. Dampier Wuetuam, M.A., Fellow of 
Trinity College, Cambridge. Communicated by Professor J. J. THomson, 
PRIS. Ss a ye. ile ate, cw lomea i ae es 
XIV. On the Singular Solutions of Simultaneous Ordinary Differential Equations 
and the Theory of Congruencies. By A. C. Dixon, M.A., Fellow of Trinity 
College, Cambridge, Professor of Mathematics in Queen’s College, Galway. 
Communicated by J. W. L. GuaisHer, S6D., VRS... . . . . . . 523 
XV. On the Ratio of the Specific Heats of Some Compound Gases. By J. W. 
Carstick, M.A., D.Sc., Fellow of Trinity College, Cambridge. Communicated 
by Professor J. J. THomson; HRS. ~ 24. x oy pan 
XVI. Iron and Steel at Welding Temperatures. By T. Wricutson, M.P., Memb. 
Inst. CE. Communicated by Professor Roperts-Austen, C.B., PRS. 593 _ 
Index to Part I. 
