594 INDEX. 



Davy (John, M.D.). Observations on the Torpedo, with an account of some additional experi- 

 ments on its electricity, 531. 



Some remarks in reply to Dr. Daubeny's note on the air disengaged from 



the sea over the site of the recent volcano in the Mediterranean, 551. 



Dawes (Rev. W. R.). His letter to Mr. Dollond respecting the performance of the concave 

 achromatic glass lens, &c., 200. 



Death, on the nature of, 167. 



DoLLOND (George, Esq.). An account of a concave achromatic glass lens, as adapted to the 

 wired micrometer when applied to a telescope, which has the property of increasing the mag- 

 nifying power of the telescope, without increasing the diameter of the micrometer wires, 199. 



Dynamics, on a general method in, by which the study of the motions of all free systems of attract- 

 ing or repelling points is reduced to the search and diiFerentiation of one central relation, or 

 characteristic function, 247. 



E. 



Electricity, sixth series of experimental researches in, 55. 

 seventh series of experimental researches in, 77. 



■ on the absolute quantity of, associated with the particles or atoms of matter, 116. 



■ on some elementary laws of, 213. 



■ eighth series of experimental researches in, 425. 



■ ■ ■ experiments to measure its velocity, and the duration of electric light, 583. 



Electro-chemical decomposition, on some general conditions of, 79. 



on the definite nature and extent of, 102. 



Electrode, meaning of the term explained, 78. 



Electrodes, on the primary or secondary character of the bodies evolved at the, 93. 



Electrolyte, on the resistance of, to electrolytic action, and on interpositions, 460. 



Electrolytes, what, 78. 



Electrolyzation, on the intensity necessary for, 448. 



F. 



Faraday (Michael, D.C.L.). Experimental researches in electricity. Sixth series. 55. 



Seventh series. 77. 



Eighth series. 425. 



G. 



Gaseous bodies, on the power of metals and other solids to induce the combination of, 55. 



H. 



Hamilton (William Rowan, Royal Astronomer of Ireland). On a general method in dynamics ; 

 by which the study of the motions of all free systems of attracting or repelling points is re- 

 duced to the search and differentiation of one central relation, or characteristic function, 247. 



Harris (William Snow, Esq.). On some elementary laws of electricity, 213. 



Heat, on the repulsive power of, 485. 



High water, on the empirical laws of the time of, 19. 



on the empirical laws of the height of, 28. 



Homogeneous fluid at liberty, on the equilibrium of a mass of, 491. 



