./.\I>EX TO VOLUME II. 



469 



POINTING TEI.I:I. i:\rn. 

 ills of, accordance of, 145) ; 

 mode of production affects con- 

 ductivity of, 143 ; protected resis- 

 timiv mil. Hit ; resistance, increase 

 of with temperature, tables of, 

 151, 1 .">:.', !.">.'! ; table of variation 

 of conductivity of, 143 ; for tem- 

 perature effects, not previously 

 experimented on, 142 ; (wire 

 annealed and maintained at 

 maximum temperature, 144 ; in- 

 crease of resistance with tempera- 

 ture, 125 ; resistance of, different 

 in forged and fused, 143). 



Pointing telegraph instruments, 6 ; 

 adapted for, 6 ; alarums, with, 6 ; 

 (application to fire and police 

 stations, 7 ; train service, 6) ; 

 consist of, 6 ; dial and hands of, 

 ; instances of use of, 6, 7 ; (and 

 jirintiny instruments, description 

 of, 7 ; difference between, 8 ; in- 

 ternal arrangement similar in, 8 ; 

 mechanical action of, 8 ; mechan- 

 ism of, details of, 7 ; principle of 

 action of, 7 ;) sending message by, 



6 ; simplicity of, 6. 



Portable engine, electric motor 

 lighter and more easily used than, 

 260. 



Power of electric light, estimating, 

 137. 



Preece, W. H., electric lighting, 

 recent advances in, 245 247 ; 

 lightning and lightning conduc- 

 tors, 128 129 ; sound and electri- 

 city, connection between, 196 

 198 ; submarine cables in shallow 

 waters, 75 84, discussion of 

 papers by. 



Printing type instrument, function 

 of, 7 ; printing mechanism of, 8 ; 



' Wheatstoiie's, 21. 



Propellers converging, manoeuvring 

 power obtained by, 139. 



Pumping water by dynamo-electric 

 current, 259. 



BELAY. 



Pyrometer, platinum ball, descrip- 

 tion of, 149. 



QUICK-GROWINO seeds and plants, 

 experiments on, with electric light, 

 228. 



RAILS, insulated, arranged as con- 

 ductor for dynamo-electric loco- 

 motion, 244. 



Rangoon Singapore cable, generation 

 of heat in, cause of, 82 ; heating of, 

 discovered by Siemens's electric re- 

 sistance thermometer, 81, 84 ; (/- 

 sulation of, 61 ; loss of, through in- 

 creased temperature, 80) ; Miller's, 

 Professor, chemical investigation 

 of, 80 ; Siemens's electric investi- 

 gation of, 80 ; testing of, 79. 



Rate messages may be sent long 

 distances, 35. 



Rays from electric light, greater 

 number of non-luminous, 247. 



Receiving instruments, 45. 



Recording instruments, Morse's, ad- 

 vantages of, 33 ; Steinheil's, 20. 



Red Sea cable, 91 ; condition general 

 of, 76 ; electric condition of, super- 

 intended by Siemens and Halske, 

 76. 



Refrangible rays, absorbed by glass, 

 255. 



Regenerative gas furnace and De- 

 ville furnace, difference between 

 methods of obtaining heat by, 221 ; 

 and electric furnace compared, 

 226 ; high temperature attainable 

 by use of, 221 ; steel made by 

 open-hearth process in, 221. 



Regulating and measuring electric 

 currents, Siemens's, C. W., machine 

 for, 201. 



Reiser, static electric telegraph, 17. 



Relay, delicate, important point in 

 construction of, 33 ; illustration 

 of action of, 34 ; and key arrange- 



