844 



INDEX. 



FIG 



Figures, Chladni's, 368 ; cohesion, 22 



Films, liquid, 22, 26 



Filter, self -supply ing, 259 



Fire-engine. 296 ; air-vessel of, 296 



Flame-manometer, 395 



Flask, specific gravity, 41 



Flattening of a globe, 140 



Flexural rigidity, 152 



Float, construction of, 775 



Floating bodies, 191 ; in air, 222 



Flow through tubes of unequal bore, 

 306 



Fluids, 13 



Flute, 382 



Flying top, 303 ; wheel, 30 i; construc- 

 tion of, 305 



Focal length, 444 



Foci of mirrors, 444 ; of lenses, 469 



Focus, 444 



Force, 48 ; coercive, 736 ; electromo- 

 tive, 648; expansive, 13; portative, 

 711 ; centrifugal, 131 



Forceps, 28 



Forces, molecular, 33 



Foucault's pendulum experiment, 130 



Fountains, 197 



Frame saw, 170 



Franklin's pane, 619 



Fraunhofer's lines, 505 



Freezing mixtures, 831 



Freezing point of water, 765 



Friction, a source of heat, 827 



Fricticnal electricity, 551 



Fulcrum, 83 



Fulminating pane, 619 



Fundamental note, 348 



Fusing points, 787 



Fusion, 787 ; latent heat of, 823 



r\ ALILEAN telescope, 527 



IjT Galvanic electricity, 647 



Galvanic element, 647 ; current, 655 ; 

 effects of, upon conductors, 668 ; cir- 

 cuit 653 



Galvanometer, 747 



Galvanoplastics, 690 



Gamut, 349 



Gases, 17; absorption of, 317; expan- 

 sive force of, 13, 18 ; compressibility 

 of, 13 ; conductivity of, 815 ; diffusion 

 of, 321 ; liquefaction of, 808 ; specific 

 gravity of, 783 ; equilibrium of, 219; 

 vibrations of, 375 



Gaseous state, 17 



Gauge for measuring thickness of wi res, 

 95 ; for measuring pressure of air in 

 receiver of air-pump, 277 



INS 



Geissler's tubes, 638, 75 1 



Glass tubes, how to cut, 14 



Gold leaf, thickness of, 2 



Governors of steam-engine, 143 



Graduating liquid measures, 37, 38 



Gramme, 34, 779 



Gravity, 7; specific, 39; determination 



of specific, 40 ; centre of, 103 

 Gravity batteries, 685 

 Guinea and feather experiment, 288 



HARDNESS, 152 ; scale of, 152 

 Harmonicon, chemical, 379 



Harmonics, 362 



Heat, 756 ; expansion by, 757 ; me- 

 chanical equivalent of, 828 ; radia- 

 tion of, 810; absorption of, 811; 

 quantity of, 818; unit of, 817; 

 specific, 816, 819 ; latent, 823 



Heating by steam, 829 



Height of barometer, 233 ; variations 

 of, 234 



Helix, 700 



Hemispheres, Magdeburg, 279 



Henley's discharger, 634 



Henschel's turbine, 204 



Hero's engine, 797 ; fountain, 247 



Homogeneous bodies, 106 



Humour, aqueous, 516; vitreous, 516 



Hydraulic press, 162 



Hydrogen for filling balloons, 224 



Hydrometers, 191 



Hydrostatic bellows, 181 



Hydrostatics and hydrodynamics, 158 



ICE, density of, 792; fusion of, 791, 

 824 ; expansive force of, 792 



Images, formation of, by lenses, 469 ; 

 by mirrors, 440 ; virtual and real, 

 440 ; by reflection, 432 



Impenetrability, 7 ; experiment show- 

 ing, 8 



Incidence, angle of, 429 



Inclination, magnetic, 742 



Inclined plane, 88 



Induced currents, 748 ; high tension of, 

 753 



Induction, magnetic, 711; electrical, 

 563 ; by currents, 748 



Induction coil, 751 



Inductive action on jets, 581 



Inertia, 43 ; experiments on, 45, 46 



Injector, 797 



insulation, 561 



Insulating bodies, 559 ; stool, 609 



Insulators, 559 



