458 



INDEX TO VOLUME II. 



ELECTRIC ENERGY. 



of, 201, 211 ; (regulator, affected by 

 currents of air, or rapid variation 

 of external temperature, 203 ; de- 

 scription of, 201, 202 ; exhibited 

 at Royal Society soiree, 201 ; 

 method of working of, 202 ; rate 

 of dissipation of heat by, 203 ; 

 rationale of, 203 ; sensitive strip 

 of, small capacity for heat and large 

 radiating surface of, 203 ;) regu- 

 lator with carbon disks, descrip- 

 tion of, 204, 212 ; transmission 

 and distribution of energy by, 209. 



Electric energy, application of, to 

 pumping water, &c., 259 ; dynamo- 

 electric machine, economical mode 

 of producing, 220 ; galvanic 

 battery, expensive mode of pro- 

 ducing, 220. 



Electrical force produced from 

 dynamical without the aid of per- 

 manent magnetism, 119. 



Electric furnace, advantages of, viz. 

 unlimited temperature, neutral 

 atmosphere, temperature inside 

 crucible higher than outside, 226 ; 

 beam of, with negative-electrode 

 at one end, cylinder of soft iron 

 within solenoid on the other and 

 adjusting weight, 223 ; calcula- 

 tion of heat required in, 225 ; car- 

 bon electrode affecting chemical 

 action in, 225 ; chemical reactions 

 in, at temperature not hitherto 

 attainable, 227 ; compared with 

 ordinary and regenerative furnace 

 for fusion of steel, 226 ; crucible 

 for, description of, 222 ; efficiency 

 of, 226 ; electrodes, positive and 

 negative of, 223 ; experiment 

 with, 225 ; material to be fused 

 forms positive pole of, 224; for non- 

 conductive substances, arrange- 

 ment of, 224 ; power of, may be 

 increased by increasing size of 

 crucible and power of dynamo, 

 225 ; solenoid coil regulates arc 



ELECTRIC LIGHT, 

 of, 223 ; time necessary for effect- 

 ing fusion in, 224 ; water-pole for, 

 225. 



Electric fusion, automatic adjust- 

 ment of arc for, 224. 



Electric illumination, economical 

 results by means of, 233 ; metallic 

 reflectors, use of, in, 234. 



Electric horizontal lamp, 237 ; con- 

 tinuous supply of carbons to, 239 ; 

 description of, 219, 238 ; gravity 

 or springs supplying carbons to, 

 219, 238 ; regulating, with steel 

 tape arrangement, 239 ; solenoid 

 coil for, 238. 



Electro-horticulture, 227 ; applica- 

 bility to save fruit bud at time of 

 setting, 232 ; arrangements for, 

 253 ; consideration of number of 

 lamps required per acre, 234 ; cost 

 of, 233 ; cost of depending on cost 

 of mechanical energy, 236 ; cost 

 of, with steam-engine as prime 

 mover, 258 ; further experiments 

 on, 253 ; management of electric 

 apparatus for, very simple, 235, 

 260 ; practical commercial appli- 

 cation of, 240 ; trial of with 

 electricity applied in the day for 

 pumping and farm purposes, 237, 

 247, 259 ; trial of with six horse- 

 power engine and two dynamos 

 producing 12,000 candle power of 

 light, 236 ; trial of, on working 

 scale, 236, 237 ; waste heat from 

 steam-engine applied to heat hot- 

 houses in, 236, 247, 253. See 

 Electric light and vegetation. 



Electric light, analysis of, 187 ; con- 

 sumption of coal in producing 

 light by, and by gas, 188 ; costly 

 with galvanic batteries, 198 ; Sir 

 H. Davy produced with galvanic 

 batteries at beginning of the cen- 

 tury, 198; economical application 

 of with water-power, 235 ; economi- 

 cal means of producing, 188 ; 



