666 INDEX. 
E 
Eclipse (total) of the Sun, on July 28, 1851, observed at Goteborg; with a description of a new 
S35 
position micrometer, 335, 
Eclipses (total) of the Sun, on the red prominences seen during, 461. 
Eclipse (total Solar) of 1851, 503. 
Eildon Hills, notes on the geology of the, 211. 
Elasticity, on the centrifugal theory of, and its connection with the theory of heat, 425. 
Equilibrium of Elastic Solids, on the, 87. 
Expansive Machines, on the economy of heat in, 205. 
F 
Fish, in relation to Diet, some observations on, 599. 
Fluorine, on two new processes for the detection of, when accompanied by silica, and on the presence 
of fluorine in granite, trap, and other igneous rocks, and in the ashes of recent and fossil 
plants, 483. 
Fores (Epwarp) and Joun Goonstr. On some remarkable marine invertebrata new to the British 
seas, 307. 
Forbes (James D.), On the volcanic geology of the Vivarais (Ardéche), 1. Notes on the geology of 
the Eildon Hills in Roxburghshire, 211. 
G 
Gaseous Fluid, on a method of discovering experimentally the relation between the mechanical work 
spent, and the heat produced by the compression of a, 289. 
Géteborg, on the total eclipse of the sun, on July 28, 1851, observed at Goteborg; with a description 
of a new position micrometer, 335, 
H 
Heat, on the mechanical action of, especially in gases and vapours, 147. On the economy of, in 
expansive machines, 205. On the dynamical theory of, 261, 475. On the mechanical 
action of, 561, 565. 
How (Henry). On certain salts and products of decomposition of comenic acid, 225. On meconic 
acid, and some of its derivatives, 401. 
I 
Interfering Light, on the total intensity of, 317. 
Invertebrata (Marine) new to the British Seas, on some remarkable, 307. 
J 
James (Captain Henry), On a necessary correction to the observed height of the barometer depend- 
ing upon the force of the wind, 377. 
K 
Kexzanp (Rey. P.), Ona process in the differential calculus, and its application to the solution of 
certain differential equations, 39. 
L 
Light (Interfering), on the total intensity of, 317, 
Light (Zodiacal), contributions to a knowledge of the phenomena of, 489. 
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