DRAFT OF A CLASSIFICATION FOR THE WORLD's FAIR. 089 



421. Magnets, etc. 



Lodestoue, compasses (marine aud surveyors'). Horseshoe and other mag- 

 nets. Magnetic needle. 

 Appliances for making permanent magnets. 



422. Machines and Appauatus for Producing and Storing Electricity (for 



POWER and light). 



Chemical batteries, coils aud electro-magnets. 



Dynamos — High and low voltage, direct aud alternating. For arc and in- 

 candescent systems. 

 Storage batteries. 

 Portable batteries. 

 Special shafting aud appliances for increasing speed. 



423. Appliances for the Transmission and Regulation of the Electrical 



Current. 

 Cables, wires aud insulators, rheostats, switches, ammeters, resistance boxes, 



indicators aud meters, voltmeters, hydrometers aud converters. 

 Safety aud protective appliances. 

 Liglituing rods and ornaments, insulators, rods, cables aud "grouuds." 



424. Appliances for the Utilization of Electricity Direct or uy Stokagr 



Batteries. 



Boat aud car motors, boat-steering apparatus, electric locomotives. Over- 

 head aud underground systems. Fan, sewiug-machine, dental and other 

 small motors. Cables, insulators, etc. 



Thermal batteries, etc. Electric nuisical appliances. Magnetic locks. Chan- 

 delier and lamp lighters. Appliances for igniting tori)edoes and explosives. 



Apparatus for removing incrustation from steam boilers. 



425. Electric Telegraph and Signals. 



Transmitters, receivers, switch boards, aud all special appliances for single, 

 duplex, and quadruplex telegraphy. Keys, relays, repeaters. Tickers 

 and brokers' lines. 



Bells, burglar alarms, clocks. 



Mechanical code transmitters. 



426. Electric Lamps and P^ixtures. 



Arc lamps — Single, duplex. Carbons and attachments. Incandescent lamps, 



etc. 

 Plugs and all other appliances for lighting. 



427. Telephones. (See also Class 813.) 



Receivers, whisperphoues, switch boards, indicators and safety appliances, 



annunciators. Special wiring. 

 Auxiliary apparatus for central stations aud series systems. 



428. Electro-Chemistry. 



Electro-metallurgy, electric welding, electrolysis. 

 Electroplating. Reproduction of relief work aiul works of art. 

 Electrotyping. Ai)pliances used for making jilates for printing and illustra- 

 ti<m. 



429. Therapeutic and otherAppliances, not elsewhere classed. 



Medical machines, baths, brushes, rollers, galvanic chairs, circuit terminals, 



body wear, electrodes. 

 Instruments for criminal execution may also be shown. 

 Electric pens and gravers. 



43. Chemical Manufactures, etc., Oils, Soaps, Waxes, Glues, Paints, Dyes, etc., Painting and 



Dyeing. 



4,S0. Principles of Applied Chemistry. 



431. The Manufacture of Acids and Alkalies. 



Vegetable acids — Acetic, citric, tartaric, oxalic, etc^ 



SM 19, pt 2 44 



