GENERAL INDEX. 



Forcing-pump, principle and construction of . . . 



Form of the specula of reflecting telescopes . . 



Fonnulee for converting the scales of Reaumur's, Fahrenheit's, 

 and the centigrade thermometers into degrees of each 

 other ....... 



Fountains and springs, origin and effect of ... 



phenomena of intermitting, ac- 

 counted for ........ 



Fracture of magnets, experiments on the effects of 



FKAXKLIX'S theory of electricity, as amended by yEpinus 

 and others . . . . . 



discovery of the identity of lightning with 

 electricity . . . 



French Academy, their attempted improvements of the ther- 

 mometer ...... 



Friction described and illustrated ..... 



Fringes (coloured) of shadows., concerning . . . 

 hyperbolical curves of . 



Frogs, experiments upon by Galvani 



FROTERINGIIAM'S pyrometer described 



Fulcrum, explanation and application of . 



Functions and structure of the eye . ... 



Fundamental law of electro-magnetism ... 



GAL i LEAK telescope described . . . NEW. OPT. 6. 



GALVANI'S experiments upon frogs . ' ' . . 



Galvanism first noticed by Sulzer ... . 



experiments on the various effects of 



electric effects of .... 



luminous effects of ... 



ignition of metals by . .... 



heat more intense than by any 

 other means . . . . . . 



electro-magnetic effects of 



chemical changes effected by . . 



physiological effects of .... 



theories of . .... 



combination of sulphur with silver by . . 

 Volta's theory of . 

 Galvanic battery, elementary, by Wollaston ... 

 of the London Institution described . 

 of piles, construction of ... 

 children's, described .... 



Hart's .. .... 



difference between, and electric battery 

 its power best determined by experiment 

 the connecting wire of, attracts iron filings 

 Galvanic circles, simple ones described . 



compound ones, construction of 

 pile Volta's, described . ... 



formed of animal substances 

 formed of vegetable substances . 

 ' trough fiflSery of Cruickshank, &c. 



> Hi Fay ...... 



iot dependent on the magnitude of the 



POP. INT. 

 OPT. INST. 



TIIEUM. 

 POP. INT. 



THERM. . 

 POP. INT. 

 NEW. OPT. 



GALV. . 



TlIKIlM. 



POP. INT. 

 NEW. OPT. 

 ELECT. MAG. 



OPT. INST. 

 GALV. , 



ELECT. MAGN. 

 GALV. 



27 



Page 

 69 

 10 



10 

 6164 



C4 

 15, 16 



. 12 

 59 



6 



28,29 

 61 

 62 

 1 



18* 



2024 

 3 

 69 



. 24 

 1 

 1 



. 919 

 9 



10 

 . 12 



12 



. 13 



. 1417 



1719 



3, 19, 20, 31 



. 24 



31, 32 



3 



4 



5 



8 



. 8 

 9 



29 

 52 

 24 

 49 

 4 

 25 

 25 

 7 

 3 



s by Roget 



pon mercury ..... 



inguished from the thermo-electric 



iis kinds' of, described 



tential . 



lie's, torsion one .... 



jtion of . . 



!af, described ..... 



edle described . 



inciples of magnetism . . . 

 artificial magnets . 



trical phenomena, when first attempted 

 cted focus distinguished . , 



ELECT. . 

 OPT. INST, 



