578 



NEGRETTI AND ZAMBRA, HOLBOEN VIADUCT, E.G., 



Electrical Shellac Cylinders, for excitation, 



2488. 



Spider, 2448. 

 Sportsman, 2476. 



See Saw, 2467. 

 Star, 2432. 



Stools, 2429. 

 Swan, 2446. 



Thunder Cloud Apparatus, 2469. 

 Harris's, 2470. 



Thunder House, 2471. 

 Wheel, Franklin's, 2464. 

 Rubber, Fur, 2491. 

 i> Egg, 2451. 

 Electro- Galvanic Coil Machines, pages 455 to 



458- 

 Electro-Gilding Apparatus, Single Cell, 2616. 



Battery process, 2619. 

 Electric Lantern, 2602. 



Light, Apparatus for, page 437. 



Carbon Points for, 2586 and 



2598. 

 Electro-Magnetic Apparatus, Compound, 



2404. 



Sets of, 2720. 



Bell Experiment, for Air 



Pump, 2871. 

 Motive Engines, page 448. 



Signal Bell, 2715, pages 460 to 465. 

 Electro-Magnets, 2664. 

 Electrometer Balance, 2409, 2410. 



Dr. Milner's, 168, 2418. 



Harris's Unit Jar, 2420. 

 Henley's Quadrant, 2413. 

 ,. Peltier's, 168, 2418. 



Electrometer, for Atmospheric Electricity, 



163. 



Cavallo's, 166. 

 Coulomb's Torsion, 2406. 

 Harris's Balance Beam, 2419. 

 Professor Thompson's 



Amospheric, 170. 

 Thomson's Quadrant, 169. 

 Volta's, 165, 2483. 

 Electroscope, Bennett's Gold Leaf, 2411. 

 Bohnenberger's, 164, 2417. 

 Cavallo's Pith Ball, or Straw, 



2414. 



Cottrell's, 7s. 6d. 

 Saussure's, 2421. 

 Singer's, 163. 

 Electro-Thermometer, Harris's, 2420, 2422. 



Kinnersley's, 2423. 



Electrotype Apparatus, Single Cell, page 



440. 

 Battery Process, page 441. 



Electrotype Materials, page 442. 

 Elipsographs, 1258. 

 Eidograph, Wallace's, To Order, 1263. 

 Elliott's Syphon Washing Trough, 3273. 

 Elliptical Drawing Compasses, 1533. 

 Electricity, Atmospheric, page 112. 

 Electric Light in Vacuo, 2557, 2762, 2601. 

 Electro-Magnetic Locomotive and Bail, 2713. 

 Eudiometrical Tubes, page 380. 

 Electrophorous, Volta's, 2387. 



Improved Vulcanite, 2388, 



Cannon, 2389. 



Eleaometer, 473, page 169. 

 Empress Opera Glasses, 792. 

 Engineers' Rule, 1698. 



Sets of Drawing Instrments, 1482 ? 



1287. 

 Engine Counter, page 201. 



Harding's, 591. 

 Wheattsone's, page 467. 



Dividing, page 31. 

 Engines, Steam, &c., pages 211, 481 to 490. 

 Engravers, Magnifiers, 700. 

 Ensigns, Flags, &c. To Order, see also 1731. 

 Engineers' Thermometers, page 157, 167, 174. 

 Equatorial Telescopes and Stands, page 252. 

 ^Ethriscope, Leslie's, 62. 

 Estimates for Sets of Meteorological 

 Apparatus, pages 123, 124, and 125, 

 Photographic Apparatus, page 553. 

 . Magic Lantern and Dissolving 

 View Apparatus, pages 350 to 

 374. 



Ettling's Gas Transferrers, 1969. 

 Eudiometers, 1970, 1971. 

 Evaporating Capsules, Platinum, 2199. 



Dishes (see Dishes and Basins). 

 Gauge or Evaporometer, 126. 

 Everest's Theodolite, 1114, 1118. 

 Exploder, Magnetic, 2808. 

 Exciting or Nitrate of Silver Bath. 3319. 

 Exhausting Syringe, 2850. 

 Expansion of Solids and Fluids, Table of, 



page 560. 



Extracting Apparatus, Dobereiner's, 2133. 

 Eye Protectors, page 219. 

 Eye Shades, 3114. 



Transparent, Occhiombra, 3115. 

 Eye Glasses, page 218. 

 Eye, model of, 745. 

 Eye Piece, Polarising, 1063. 

 Eye Pieces for Microscopes, page 269. 



Erecting, 932, 933. 



Eckhold's Omnimeter 1142. 



