392 



INDEX TO VOLUME I. 



Electrical battery, 269 

 Electrical bells, 273 

 Electrical belted bottle, 294 

 Electrical cannon, 295 

 Electrical cross, 289 

 Electrical doubler, 264 

 Electrical fire-house, 294 

 Electrical flyers, 280281 

 Electrical inclined plane, 282 

 Electrical induction, 300 

 Electrical machines, 246 

 Electrical mortar, 296 

 Electrical orrery, 282 

 Electrical pail, 285 

 Electrical pendulum, 279 

 Electrical pistol, 296 

 Electrical plates, 274 

 Electro plating and gilding, 336 

 Electrical pyramid, 308 

 Electrical rope dancer, 284 

 Electrical saw mill, 287 

 Electrical see-saw, 278 

 Electrical spark passed through 



' gasses, 304 



Electrical spider and jar, 279 

 Electrical sportsman, 283 

 Egg stand, 293 

 Electrical swan, 284 

 Electrical swing, 278 

 Electrical vane, 288 

 Electrical wheel, 207 

 Electrical wind-mill, 289 

 Electrophcrus, 258 

 Endless screw, 159 

 Engineer's Level, 90 

 Ether fired by the electrical 



spark, 297 

 Eudiometer, 303 

 Expanding threads, 277 

 Expansion fountain, 206 



Farraday's bent electrical con- 

 ductor, 299 



Flask for weighing air, 212 

 Flint and steel in vacuo, 218 

 Float wheel, 215 

 Forcing pump, 234 

 Fountain by elasticity, 221 

 Fountain in vacuo, 205 

 Freezing apparatus, 217 

 French table air pump. 191 

 Frye's lactometer, 227 



fJallows' connector, 201 



Galvanic instruments, 324 



Gauge, 40 



Galvanic battery, old form, 320 



Galvanic gas pistol, 342 



Globes, 101 



Globe quadrant, 106 



Gold leaf electrometer, 263 



Goniometer, 98 



Graphometer, 64 



Grove's battery, 337 



Guinea and feather apparatus, 

 207 



Gunpowder fired by the electri- 

 cal spark, 296 



Gunpowder fired iti vacuo, 219 



Hair compasses. 16 

 Hand glass, 201 

 Hare's calori motor, 328 

 Hare's deflagrator 326 

 Head of hair, 277 

 Hourglass, 140 



Hydraulic instruments, 224 235 

 Hydro-electrical machine, 321 

 Hydrometer, 224 

 Hydrometer with weights, 226 

 Hydrostatic bellows, 238 

 Hydrostatic equilibrium, 236 

 Hydrostatic figures, 230 

 Hydrostatic instrum's, 224235 

 Hydrostatic paradox, 237 

 Hydrostatic paradox, with pis- 

 ton, 243 

 Hydrostatic press, 242 



Ignition of charcoal ia chlorine, 



298 



Impenetrability, 142 

 Improved lever air-pump, 188 

 Inclined plane, 148 156 

 Inertia apparatus, 141 

 Insulated stand, 302 

 Insulating stool, 260317 



Jar, with discharging electrome- 

 ter, 308 



Land Chain, 49 

 Level and Plumb, 89 

 Level for slopes, 96 

 Levelling staves, 95 

 Levelling staves, portable, 96 

 Lever condenser, 200 

 Levers, 147154 



