Vill CONTENTS. 
PAGE 
XXVII. On the Centrifugal Theory of Elasticity, and its Connection with 
the Theory of Heat. By Wm. J. M. Ranxing, C.E., F.R.S.E., 
F.R.S.S.A., &c.  . . : : F . 425 
XXVIII. On the Computation of the Specific Heat of Liquid Water at 
various Temperatures, from the Experiments of M. REGNAULT. 
By Ws. J. M. Ranxing, C.E., F.R:S.E., F.R.S.S.A., &c. 441 
XXIX. On the Red Prominences seen during Total Eclipses of the Sun. 
Part I. By Witiiam Swan, F.R.S.E., . : . 445 
XXX. On the Red Prominences seen during Total Eclipses of the Sun. 
Part II. By Wit11amM Swan, F.R.S.E. (Witha Plate.) 467 
XXXI. On the Dynamical Theory of Heat. Part V. On the Quantities 
of Mechanical Energy contained in a Fluid in Different States 
as to Temperature and Density. By W1LL1AM THOMSON, M.A., 
Professor of Natural Philosophy in the University of Glasgow, 475. 
XXXII. On two New Processes for the Detection of Fluorine when accom- 
panied by Silica ; and on the Presence of Fluorine in Granite, 
Trap, and other Igneous Rocks, and in the Ashes of Recent and 
Fossil Plants. By Grorce Wi1son, M.D., é . 483 
XXXIII. Contributions to a Knowledge of the Phenomena of the Zodiacal 
Light. By Professor C. Prazzi SmyTu. (With a Plate.) 489 
XXXIV. On the Total Solar Eclipse of 1851. By Professor C. Piazzi 
SmytH. (With a Plate.) . ; : 7 - 3908 

PART IV. 
XXXV_ Observations on the Speculations of Dr Brown and other recent 
Metaphysicians, regarding the Exercise of the Senses. By 
Professor W. P. ALIson, . é F 5 > ols 
XXXVI. Summation of a Compound Series, and its Application to a Pro- 
blem in Probabilities. By Bishop TrRRoT, : iV 2 
