45, COKNHILL, E.G., AND 122, BEGENT STBEET, W., LONDON. 



)69 



Apparatus for negative and positive Collodion 

 process, or for Paper and Collo- 

 dion processes, page 553. 

 for showing diminished bulk, 2135. 

 for showing Electric Light in 

 Vacuo, 2571, 2762, pages 438, 

 439. 

 for showing magnetic curves, 



1798. 

 ,, for showing philosophical candle, 



2136. 

 for showing the impenetrability of 



matter, 3029. 



for submarine explosions, 2573. 

 for weighing air, 2861 2863. 

 hydro-pneumatic, 2175. 

 Leslie's, for freezing water, 2887*. 

 patent, for Ice making, page 507. 

 Marcet's steam, 2946. 

 Marsh's, 2688. 



Oersted's, 2661. 



Glass Blowers' patent, page 398. 

 Photographic, complete seta of, 



page, 553 



Polarising, page 277. 

 Spectrum, pages 281, 282. 

 Soda water, page 504. 

 ., Taylor's Dialysis, page 395. 

 Thermo-electric, page 450. 

 , to exhibit vibration of elastic 



membrane, 3064. 



,, to exhibit heating effects of elec- 

 trical currents, 2422, 2423. 

 to explain intermitting springs, 



2920, 2921. 

 . to illustrate curve of quickest 



descent, 3040. 



to illustrate expansion and con- 

 traction, 2961, 2963. 

 ,, to illustrate equilibrium of forces, 



3043. 



to illustrate laws of collision, 3042. 

 to illustrate laws of composition of 



force, 3038. 

 to illustrate parabolic curve of 



projectiles, 3041. 



to illustrate ventilation, 2991. 

 to produce sound by Hydrogen gas, 



2136, 3056. 

 to show expansion of liquids by 



heat, 2969. 



Benevide's Steam, 2948. 

 Hysometrical, page 92. 

 Electrical, page 412. 

 Microscopic, pages, 256, 275. 

 Wollaston's boiling point, 131. 



Apparatus, Paraffin or Petroleum Testing, 

 page 170. 



Ure's Nitrogen, 2143. 



Sturgeon's 2692, 6281. 



Specific Gravity, pages 190, 390. 



to illustrate the construction of 

 induction coils, 2706. 



., for showing hyperbolic curve pro- 

 duced by capillary attraction, 

 2936. 



to illustrate capillary attraction, 



Inertia, 3028. [2935. 



to illustrate the laws of central 

 forces, 3044. 



for producing musical flames, 2760. 



Tyndall's, for producing Heat by 

 friction, 2954 and page 482. 



Nitrous Oxide, 3116. 

 Appold's Pumps, 2927. 

 Approximate Height due to Barometric 



Pressure Table, pages 3 and 480. 

 Aquarium Thermometer, 290. 

 Archimedes' Screw, or Water Snail, 2929. 

 Architect's Scales, 1233, 1565. 



Curves, page 342. 

 Areometers, see Hydrometers, page 176. 

 Argand Lamp, Microscopic, page 271. 



Spirit Lamps, page 403. 

 Argentometer, 511. 



Armstrong's Hydro-Electric Machine, 3392. 

 Aquarium Hydrometer, 461. 



Beads, 525. 

 Arithmometer or Calculating Machine, 



page 349. 



Arrows for Land Chains, 1210*. 

 Arsenic Apparatus, Marsh's, 2139. 



Tubes, 1911. 



Tube Funnel, 1911*. 

 Artificial Horizons, page 312. 



Fountains, 2916. 

 Aspirator, Brunner's, 1931. 



Metal, page 72. 

 Astatic Needles, 2651. 

 Astronomical Slides, 1803. 



Telescopes, pages 247 to 255. 

 Atmidometer or Atmometer, Dr. Babington's, 



127. 



Atmidoscope, Babinet, made to order. 

 Atmospheric Electricity, pages 127 to 129.. 

 Atmospheric pressure, Table of, pages 3, 



480, and 557. 



Attwood's Machine, 3034, 3035. 

 Auctioneers' Glasses, 1419. 

 Auriscope, 3096. 

 Automatic Photostat, see Electric Light 



Apparatus. 



