r 



GENERAL INDEX. 



Efeetricity, transference of ...... ELECT. 



phenomena of, in its passage through a vacuum 



currents of air always accompany its discharge . . 

 Nicholson's instrument for distinguishing posi- 

 tive from negative ..... 



disguised, description of .... . 



. . accumulated, experiments on the motion of . . 



accumulation of by induction . . . , 



circuit of, meaning of the term . . . 



on the lateral explosion of .... 



its effects upon bodies generally . . . 



its mechanical effects on bodies . . . 



its chemical effects ..... . 



its effects upon animals .... 



its effects upon vegetables .... . 



evolution of heat by . . . . 



instrument for collecting weak . . . 



doublers or multipliers of .... 



development of, by changes of temperature and 



form .......... . 



by contact, compression, and other 



mechanical means ....... 



three states of distinguished . . . ELECT. MAGN. 



. . and magnetism identical .... 



of the atmosphere, experiments on . . ELECT. 

 metallic conductors of, for the safeguard of ships 



and buildings from lightning ..... 



materiality of, experiments to prove . . 



and magnetism found to be identical . . MAGN. 



Electrometers, principles of those instruments . . ELECT. 



Henley's described ..... 



Bennet's gold-leaf ..... - 

 Coulomb's, or torsion-balance . . . . 



Cuthbertson's balance .... . 



. . Lane's discharging ..... ' 



Electroscope, different kinds of ..... . 



Henry's described ... . 



Cavallo's ...... . 



Efectrophorits, Volta's, described ..... 



Electro-magnetism, history of prior to Oersted's discoveries ELECT. MAGN. 



experiment of Ritter, account of . . 



Oersted . . . 



fundamental law of explained . . 



direct consequence of the law of . . 



its effects on the directive property of the 



magnetic needle ....... 



., concentration of its effects . . 



theories of . . . . . 



heory of Oersted .... 



j itions ...... 



i Itiplier ..... 



fleets of terrestrial magnetism . . : 



duction, concerning . 



fects of galvanism .... GALV. 



:ory of Ampere .... ELECT. MAGN. 



enoid described ..... 



g, effect of 



I meaning of the term . . . GALV. . 



|battery of Wollaston . . . 



described THERM. 



lometer tubes, their use . . . 



th revolves round the sun in that curve POP. INT. . 

 of incidence and reflection known to 



. NEW. OPT. . 

 POP. INT. 11 20. MAGN. 



25 



Page 



4,11,2323 

 25 

 26 



\A re-action, a law of nature 



xplanation of the term . . . 



lation of the phenomena of the rainbow NEW. OPT. 



electricity, experiments on . . ELECT. 



the voltaic battery * GALV. 



. phenomena of .... ELECT. 



27, 28 



30,31 



3941 



3136 



37 



41 



4151 



4245 



47,48 



49, 50 



50, 51 



4547 



5153 



53 



5355 



5557 



96 



92 



59,60 



59,60 



6062 



1,88 



19 



1937 

 19 



19,20 

 38,39 



51,52 



. 14 



3 



. 46 



69 



918 



. 914 

 3238 

 7588 

 7578 

 1932 

 40 



4552 



5257 



13 



8192 



83 



90 



31 



3 



16, 17 



11 



. 31 



. 1 



3 



. 24 

 2 



4547 

 12 



