600 



NEGBETTI AND ZAMBEA, HOLBORN VIADUCT, E.G., 



Underground Theodolite, page 290. 



Temperature Registering Ther- 



mometers, Negretti & Zambra's 

 Patent, pages 171, 34, 35. 

 Undershot Wheel, model of, 2941. 

 Universal Sun Dials, pages 312 to 314. 

 Studio Camera, 3193. 

 Scales, Architects', Builders' 

 Engineers', &c., pages 339 to 

 348. 



Uranium Glass Tubes and Vessels, 2766. 

 Urea Tubes, 546. 

 Ure's Udiometer, 1971. 



Nitrogen Apparatus, 2143. 

 Ure's Steam Apparatus, 2947. 

 Urinometers, page 191. 



Metal, 540. 

 Test Paper, 541 . 

 Urinary Cabinets, page 192. 



Vacuum Gauges, pages 196, 205 to 209. 



Gauges, Mercurial, page 196, and 



For Air Pump, No. 2857 

 A 7 acuum Tubes, G-assiot's, 2742. 



. ,, Carbonic Acid, 2744. 



for Throat, &c., 3092. 



Geissler's, page 452, 2745. 



Vacuum Tubes, with Mottoes, 2746. 



Diadem or Coronet, 2749. 



Pan Thermometers, 367, 415. 

 Valentine's Dissecting Knife, 980. 

 Valve Regulating Thermometers, 357. 

 Vanes, Wind, see Anemometer, and page 96. 

 Variation of the Mariner's Compass, pages 



318, 327. 



Varley's Telescope Stand, made To Order. 

 Varnish, Photographic, page 552. 

 Varnish for Glass painting,1886. 

 Varnish, Crystal, Negretti & Zambra's, 4014. 

 Varnish Makers' Thermometers, 354. 

 Varrentrap's Nitrogen Apparatus, 2144. 

 Ventilation, apparatus to illustrate, 2991. 

 Velocity of Electricity, page 563. 

 Light, page 563. 

 Sound, page 563. 

 Wind, pages 97, 99, 103. 

 Vernier, use of described, pages 6, 7. 

 Veroe's Malt Gauging aud Ullage Rule. 1687. 

 Verification of Standard Meteorological 



Instruments at Kew, page 125. 

 Veterinary Thermometers, 311. 

 Vibrating Electro-Magnet, 2695. 



Steam Engines, models of, 3003. 

 Vibration Telephone, 3069. 

 Vice for Table, 2349. 



Vice or Clamp for Holding Tubes or Retorts. 



2332, 2339. 

 Views, for Disolving View Apparatus, and 



Magic Lantern, pages 364 to 374. 

 Albumen for ditto, page 369. 

 for Polyorama, 758. 

 ,. Stereoscopic, Glass and Paper, 



page 233. 



Vibrating Wires, Marsh's, 2688. 

 Vidi's Aneroid, page 21. 

 Videoscope, 759. 

 Vinegar Makers' Thermometers, 352. 



Hydrometer, 476. 



Vignette Glass Plates, 3288. 

 Vision, model to explain theory of, 745. 

 Visuometer, 760, 3302. 

 Vital Heat, pages 161, 560. 

 Vital Capacity of the Lungs, Table of, 



page 499. 

 Voltaic Cautery Apparatus, 3120. 



Piles, 2513, 278C. 

 Voightlander, Vienna, or Orthoscopic Lenses, 



supplied To Order. 

 Volta's Couronne de Tasse, Silver and Zinc 



wires for, 2515. 

 Electrophorous, 2386. 

 Eudiometer, 1970. 

 Condensing Electroscope, 2412. 

 Pile, 2513. 

 Volta-meter, 2565. 

 Volumeter, Gay Lussac's, 508. 

 Volumeter, 2123, page 394. 

 V Tube for decomposing neutral salts. 2567. 

 Vulcanised India Rubber Tube, 2196. 

 Vulcanite Electrical Machine, 2383, 2384. 

 Cells, 2578. 

 Electrophorous, 2388. 



Walker's Battery, 2547. 



T., Patent Harpoon Log, page 324. 

 Telegraph Testing Apparatus, 



3154, page 514. 

 T., Patent Sounding Machine, 



page 324. 



Cherub Log, page 325. 

 Bliss's Log, 1400. 

 A.. Liverpool Patent Ship Log, 



page 324. 

 Sounding Machine, 



page 324. 

 Washing Bottles, 2117 to 2122. 



Dishes and Trays, page 542. 

 Trough, Syphon, 3273. 

 Watch-sized Aneroid Barometer, page 24. 

 . Compass and Trinket. 1344 and 



page 317. 

 Glasses, 2111. 



