vi 
VALET 
XI. 
XII. 
XIII. 
XIV. 
XV. 
XVI. 
CONTENTS. 
PART II. 
Note as to the Dynamical Equivalent of Temperature in Liquid 
Water, and the Specific Heat of Atmospheric Air and Steam ; 
being a Supplement to a Paper On the Mechanical Action of Heat. 
By Wn. J. M. RANKINE, Civil Engineer, F.R.S.E., F.R.S.S.A., 
&c., : : ; , ; 
. On the Power and Economy of Single-Acting Expansive Steam En- 
gines, being a Supplement to the Fourth Section of a Paper On the 
Mechanical Action of Heat. By Wm. J. M. Ranking, Civil En- 
gineer, F.R.S.E., F.R.S.S.A., &c., 
. On the Economy of Heat in Expansive Machines, forming the Fifth 
Section of a Paper On the Mechanical Action of Heat. By Wm. 
J. M. Ranxine, Civil Engineer, F.R.S.E., F.R.S.S.A.,  &c. 
(With a Plate.) 
Notes on the Geology of the Eildon Hills, in Roxburghshire. By 
JAMES D. ForBes, F.R.S., Sec. R.S. Ed., Professor of Natural 
Philosophy in the University of Edinburgh. (With a Plate.) 
On a new Sowrce for obtaining Capric Acid, and Remarks on some of 
its Salts. By Mr Tuomas Henry Rowney, F.C.S. Communi- 
cated by Dr T. ANDERSON, 
On certain Salts and Products of Decomposition of Comenic Acid. By 
Mr Henry How. Communicated by Dr T. ANDERSON, 
On the Products of the Destructive Distillation of Animal Substances. 
Part II. By Tuomas Anverson, M.D., F.R.S.E., 
On the Dynamical Theory of Heat, with numerical results deduced 
from Mr Joutx’s Equivalent of a Thermal Unit, and M. Rue- 
NAULT’S Observations on Steam. By WittiaM THomson, M.A., 
Fellow of St Peter’s College, Cambridge, and Professor of Natural 
Philosophy in the University of Glasgow, 
On a Method of Discovering experimentally the Relation between the 
Mechanical Work spent, and the Heat produced by the Compression 
of a Gaseous Fluid. By Witt1am Tomson, M.A., Fellow of St 
Peter’s College, Cambridge, and Professor of Natural Philosophy 
in the University of Glasgow, 
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