45, CORNHILL, E.G., AND 122, REGENT STREET, W., LONDON. 



577 



Du Bois Kaymond's Galvanometer, 2671. 

 Dubosq's Spectroscope, 1081. 



Electric Lamp, 2559. 

 Duchess Opera Glasses, 802. 

 Dumas' Gas Tubes, 1999. 

 Dumpy Levels, 286. 

 Duckham's Patent Weighing Machine and 



Dynamometer, 592, page 202. 

 Dia-Magnetic Experiment, 2703. 

 Dialyser, A. S. Taylor's, page 395. 

 Dynamometer, Schaeffer's, 609. 

 Dynamo- Magneto-Electric Machines, 2604> 



page 439. 



Ear Illuminator, Jordan's, 3093. 

 Electrical, 2754. 



Earth or Ground Thermometer, pages 34, 35, 



42 and 43. 



Earth Temperatures, page 172. 

 Ebonite or Vulcanite Goods. Baths, Forceps, 



Funnels, Trays, supplied to order. 

 Curves, Scales, Rules, &c., 1634. 

 Battery Cells, 2578. 

 Electrical Machine, 2383. 

 Educational Microscopes, pages 258, 259. 

 Electrepeter, 2699. 



Bachoffner's, 2701. 



Dr. G. Bird's, 2700. 

 Electrical Amalgam, 2505. 



Apparatus, pages 412 to 427. 



Apparatus for igniting gunpowder, 

 &c., 2474. 



Batteries, 2394. 



Bells, pages 422 and 460. 



Bird, 2433. 



,, Bomb or Mortar, 2481, 2572. 



., Brass Balls, 2503. 



Bucket and Syphon, 2453' 



Cannon, 2477. 



Chain, 2506, 2436. 



Column, De Luc's, 2415. 



Condenser, 2425. 



Conductors, 2496. 



Conducting Wire, Flexible, 2507. 



,. Cylinders of glass for machines* 

 2493. 



Dancing Figures, 2442. 



Diamond Jars, 2437. 



Directors, Medical. 2400. 



., Discharger, Henley's, 2407. 



Cuthbertson's, 2409. 



De La Rue's, 2680. 



Electricity, Collection of, page 119. 



,. Atmospheric, 162. 

 Electrical Apparatus, Biot's, 2404. 



Dischargers, page 416. 



Electrical Egg Stand, 2438. 



Egg Stand, Faraday's, 2439. 



Falling Star, 2452, 2571. 



Figures, 2446. 



Flask, 2450. 



Fly or Wheel, 2462. 



Fire House, 2472. 



Gamut of Bells, 2458. 



Glass Handles, 2499. 



Glass Legs and Rods, 2502. 



Glass Tubes and Cylinders for 



excitation, 2490. 



Globe, 2451, 2557. 



Gutta Percha Supports, 2501. 



Hand Spiral, 2454. 



Head of Hair, 2445. 



Image Plates, 2440. 



Inclined Plane, 2468. 



Jars for Frankliniau Experiment, 



2402. 



Lamp, 2596. 



Lamp, Duboscq's, 2558, 2559. 



Lightning Plates, 2435. 



Luminous Chain. 2436, 2456. 



Conductors, 2496. 



Powder Cannon, 2572. 



Machine, Cylinder, 2377. 



complete with apparatus, 



2379. 



Plate, 2380 to 2384. 



Vulcanite Plate, 2383. 



Woodward's, 2382. 



Piche's, 2391. 



Ramsden's, 2380. 



Nairne r s, 2377. 



Armstrong's, 3392. 



Winter's, 2381. 



Holtz', 2383. 



Wimshurt's, 2391*. 



Voss's, 2390. 



Magic Picture, 2427. 



Mill, 2466. 



Names or Words, 2431. 



Orrery or Planitarium, 2465. 



Painted Glass Plane, 2434. 



Plates of glass, for Machines, 2494. 



Plates, Ebonite, for ditto, 2495. 



Pile, De Luc's, 2415. 



Zamboni's, 2416. 



Pistol. 2478. 



Pith Balls, 2444*. 



Pith Ball Stand, 2443. 



Pith Figures, 2442. 



. Plumes, glass and paper, 2449. 



Powder House, 2473. 



Spirals, Revolving, 2455, 2457. 

 2 P 



