394 



INDEX TO VOLUME I. 



Theodolite, 80 

 Theodolite, four sighted, 64 

 Three globe fountain, 206 

 Thunder house, 307 

 Tide dial, 116 

 Time glass, 140 

 Torricellian experiment, 215 

 Torsion balance, 306 

 Transferrer, 220 

 Transit instrument, 125 

 Triangular compass, 24 

 Trough batteiy, 325 

 Troughton's level, 93 

 T square, 38 

 Tube compass. 26 



Universal discharger, 265 



Universal joint dial, 139 

 Upward pressure apparatus, 208 

 Urinary cabinet, 229 

 Urinometer, 229 



Vacuum gauge, 223 



Van Melsen's battery, 331 



Volta's condenser, 264 



Water Hammer, 221 

 Water pump in vacuo, 217 

 Wedge, 148157 

 Weight lifter, 208 

 Wheel and axle, 149 

 Whirling table, 160172 

 Wirtemburg syphon, 232 

 Woluston's battery, 230 



INDEX TO SUPPLEMENT. 



Baumc's Sacarometer, 388 

 Binoptric Magic Lantern, 378 

 Claude Lorraine Mirror, 373 

 Common School Apparatus, 386 

 Camera Lucida, 363 

 Chemical Cabinet, 384 

 Dioptric Magic Lantern, 373 

 Drawing Board, 357 

 Equatorial Telescope, 366 370 

 Magneto-Electric Machine, 383 

 Magnetic Beam Engine, 381 

 Magnetic Axial Engine, 382 



Microscope, Compound, 352 

 Microscope, Achromatic, Ross, 354 

 Microscope, Nachet's, 359 

 Microscope, Micrometer for, 363 

 Microscope, Polarizing Appa., 364 

 Steam Engine, 385 

 Stercscope, 372 

 Telegraph Model, 379 

 Theodolite, Pike's Improved, 343 

 Transit Theodolite, 346 348 

 Trallis's Hydrometer, 389 



