45, CORNHILL, E.O., AND 122, EEGENT STREET, W., LONDON. 



Copper Bottle, improved form, 2863. 

 Copper Disc, rotation of, 2694. 

 Coronet or Diadem Vacuum Tubes, 2749. 

 Concentric Stage, Natchet's, fitted to order. 

 Copper Wire, insulated with Gutta Percha, 

 2719. 



covered with Cotton, Silk, and 



Gutta Perch , page 449. 

 Copper Wire Table of relative lengths and 



weights, page 455. 



Copying or Pressure Frames, page 546. 

 Cork Borers, 2215, 2217. 

 Corn Balance or Chrondrometer, 1688. 

 Cosmoramic Glasses, 730. 

 Camera, 742. 



,, Stereoscopes, 771. 

 Crooke's Radiometer, page 276. 

 Cosmoscope, Frith's, supplied to order. 

 Couch or Malt House Kod, 1684, 1685. 

 Couronne de Tass, Volta's, 2515. 

 Comparative Table of Foreign and English 



Measures of Length, see Appendix. 

 Crayon Holders, 1641. 

 Creamometer, 485. 



Cream Test Tubes and Jars, page 186. 

 Cross of Metal, for experiments on conduction 



of heat, 2203, 2971. 

 Cross Sight, Surveyors', page 292. 

 Crossley's Rain Gauge, 120. 



,, Recording Anemometer, page 111. 

 Crucibles, Berlin Porcelain, 1943. 



cases and covers, 1939. 



Hessian, 1937. 



jacket, 1939. 



London fire-clay, 1938. 



Platinum, &c., 2206. 



round, 1942. 



skittle shaped, 1941. 



Stands and Supports, 2302, 2332. 



Tongs, 2209. 



., Wedgwood, 1940. 

 Cruikshank's Galvanic Batteries, 2518. 

 Cryophorous, Wollaston's, 1948. 

 Crystal Varnish, 4014. 

 Crystals, Polarizing, various plates of, pages 



1075, 1076. 



Cubic Inch Bottles, 1951, 2077. 

 Measures, 1949. 

 Tubes, 1950. 

 Cubical Vessel, Tin, 2978. 

 Cubing Rule, 1703. 

 Cup Reflector, or Lieberkuhn, 949. 

 Current Meters, 1190. 

 Cuthbertson's Self-acting Balance Discharger, 



2409. 

 Cntting Diamonds, 2225. 



Cutting or Shaping Glasses. 3286. 



Knives, 3287. 

 Curtain Effect for Lantern, 1826. 

 Curves, Ship ; 1633. 



Architectural, 1630. 



,. Mathematical, 1629. 



Radii, 1631. 



Railway, 1632. 

 Curves, Ebonite, 1634. 

 Cylindrical Gas Jars, 1894. 

 Cylinders, Electrical, for Machines, 2493. 

 Cylinders of Lime, 1795. 



of Wire, Gauze, Electrical, 2487. 

 Cylindrical Lenses, 732. 

 Mirrors, 733. 



Daguerreotype Apparatus, To Order. 



Damp Detector, 1346. 



Daniell's Galvanic Batteries, 2525. 



Hygrometer, 85. 



Pyrometer, 596, 2956. 

 Dark Box, Negretti and Zambra's Improved, 



page 487. 



Dark Lanterns, 3230. 



Dark Slides or Backs for Cameras, page 531. 

 Dark Tent, page 534. 



Dark Wells or Stops, for Microscopes, 954*. 

 Davy's Safety Lamp for Miners, 2264, 2993. 

 Day and Night Telescopes, 831. 

 Debuscope, 748. 

 Decimal Weights, 2222. 

 Deck Glasses and Prisms, page 322. 

 Deck Telescopes, 839. 

 Decomposition of Water, Apparatus for, 



2560 to 2567. 

 Deer Stalking Glasses, 828, 829. 



., Binocular, page 241. 



Deep Sea Sounding Thermometers, Negretti 



and Zambra's, pages 66, 67. 

 De Londe's Lightning Plate, 2435. 

 Deflagrating Jars (see Gas Jars and 



Receivers 



Spoon, 2218. 



Deflecting Needles, 2648. 

 De la Rive's Floating Battery, 2686. 

 De la Rue's Electrical Discharger, 2680. 

 De Luc's Pile, 2415. 

 Densimeter, Gay Lussac's. 509. 

 Rousseau's, 510. 

 Fahrenheit's, 502. 

 Dentists' Blowpipes, pages 397, 399. 



,, Mirrors, 3111. 

 Designs, Selenite, 10G8. 

 Dessicating Jars, 1965. 



and Tubes, 1967. 

 Detector Galvanometer, 2674. 



