364 INDEX. 



Electricity, experimental researches in. Ninth series. 41. 



. , Tenth series. 263. 



Equations of motion, integration of, by means of one principal function, 98. 



Expression for the principal function in any problem of dynamics, general method of improving 



an approximate, 101. 

 Expressions, differential, simplification of, &c., 135. 



F. 



Faraday (Michael, D.C.L.). Experimental researches in electricity. Ninth series. 41. 



Tenth series. 263. 



Farquharson (Rev. James). On the ice formed, under peculiar circumstances, at the bottom of 



running water, 329. 

 Fossil shells found in Sweden, list of, ZS. 

 Fox (R. W.). Note on the electrical relations of certain metals and metalliferous minerals, 39. 



G. 



Gray (John Edward, Esq.). Remarks on the difficulty of distinguishing certain genera of tes- 

 taceous Mollusca by their shells alone, and on the anomalies in regard to habitation observed 

 in certain species, 301. 



H. 



Hamilton (Prof. W. R.). Second essay on a general method in dynamics, d5. 



I. 



Ice formed, under peculiar circumstances, at the bottom of running water, on the, 329. 

 sometimes formed at the bottom of still water, note 342. 



L. 



Light, researches towards establishing a theory of the dispersion of, 249. 



Lubbock (J. W. Esq.). On the determination of the terms in the disturbing function of the fourtii 



order, as regards the eccentricities and inclinations which give rise to secular inequalities, 57. 



Discussion of tide observations made at Liverpool, 275. 



Lyell, Charles, Jun., Esq.). The BaTterian Lecture. — On the proofs of a gradual rising of the 



land in certain parts of Sweden, 1 . 



M. 



Magnetism, terrestrial, geometrical investigations concerning the phenomena of, 221. 

 Metals and metalliferous minerals, note on the electrical relations of, &c., 39. 



N. 



Needle {magnetic), on the points of the earth's surface at which it takes a position vertical to the 



horizon, 245. 

 Nerves of motion and of sensation, and the brain, on the relations between, &c. — Continuation of 



the paper on, 255. 



P. 



Partial differential equations of the first order, &c., investigation of a pair of, 100. 



