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



571 



Batteries, Galvanic, Floating, De la Eire's, 

 2686. 



,, Grove's, page 431. 



Grove's gas, 2540. 



Maynooth, 2544. 



., Smee's, page 430. 



Sturgeon's, 2522. 



Wollaston's, 2520. 



., Walker's, 2547. 



Sulphate of Mercury or Pile de 

 Marie Davy, 2782, page 457. 



Per-oxide of Manganese, or Le 

 Clanche's, 2554, page 433. 



Dr. Leeson's, 2548. 

 Mullin's, 2528. 



Bichromate Bottle, 2551. 



Crosse's Water, 2541. 



., Fuller's, 2553. 



Sulphate of Lead, 2549. 

 Batteries, in s^ts, for Electric Light, page 



437. 

 Battery Cells, 2574. 



Plates, Amalgamated Zinc, 2582. 

 Beaume's Hydrometer, 421, page 177. 



ditto for Soap, 422. 



Acidometer, 422. 



Saccharometer, 423. 

 Bead's, Salt Water, 525. 



Specific Gravity, 524. 



Lovi's, 524. 



Glasgow, 526. 

 Beaker Glasses, 1916. 



Tumblers, 1917. 

 Beale's Neutral Tint Reflector or Camera 



Lucida, 962. 



Clinical Cabinet, 545. 

 Beam Compasses, 1243. 



fittings, 1547. 



., Tube, 1546. 



Beckley's Anemometer, page 110. 



Thermograph and Hygrometer, 

 page 78. 



Magnetograph, Kew arrangement, 



page 130. 



Beer Dip Rules, page 345. 

 Beetle Microscopes, 694. 

 Bellows or Blowers, 2187, 2181. 



., Hydrostatic, 2915. 



., Organ, 3068. 



Bell Experiment for Air Pump. 2870. 

 Bells, Electrical, pages 462 to 465. 



Fog, 1434. 



Berzelius' Sulphuretted Hydrogen Apparatus, 

 2129. 



Washing Bottle, 2117. 

 Berlin Porcelain, page 376. 



Bichromate Battery, 2551. 



Bijou Opera Glasses, 805. 



Binding Screws, 2623. 



Binks' Alkalimeter, 1902. 



Binnacles, page 326. 



Binnacle Tops, 1424. 



Binocular Deer Stalking Glass, page 241. 



Microscopes, page 264. 



Opera and Race Glasses, page 234. 



Telescopes, Negretti and Zambra's 



improved, page 241. 

 Biot's Electrical Apparatus, 2404. 



., Polariscope, 1052. 

 Bird's, Dr. Golding, Inversor, 2700. 



Vibrating Magnet, 2695. 

 Bisulphide of Carbon Prisms, 1087. 

 Black Mirrors, for Artists, 715. 

 Bladder Ferrules, 2160. 



Frame and Weights, 2894. 



Glasses, 2868. 

 Bladders, To Order. 



Blasting and Mining Apparatus, page 463. 

 Blending Jars, 450* 



Blind Scale Brewer's Thermometers, 280. 

 Blowing Machines, for Oil Lamp Furnace, 



page 2243*. 



Blowpipe, Black's, Bergman's, and Berzelius', 

 2166, 2167*. 



Pepys' and Wollaston's, 2167*. 



Apparatus, pocket, 2187. 



,, Forceps, brass, &c. 2184. 



Gas and Steam, 2172. 



Hemming's Safety Oxy -hydrogen, 

 2168. 



jets, Platinum, 2163. 



minerals, in boxes, 2189. 



Oxy-Hydrogen, 2169. 



,, Rose's, or Russian spirit, 2173. 



self-acting Spirit, 2170. 



Spoons, 2186. 



Tilley's Water Pressure, 2175. 



various, pages 397 to 399. 

 Board of Trade Barometer, 15, page 11. 

 Board of Trade Hydrometer. 



(see Hydrometers.) 

 Board of Trade Thermometer, 40. 

 Boards, Drawing, page 1642. 



Pressure, 1785. 



,, Preparing, To Order. 

 Boat Compasses, page 319. 



Barometer, 196. 

 Bohnenberger's Electroscope, 164. 



,, Machine, page 495, 2417. 



Boiling Point Apparatus, page 92. 

 Boiling Points, Table of, page 133. 



