D.,  hydraulic  compressor,
183


Petit  and  Boudenoot  vacuum  system,

164,  199

Petroleum  engines,  54
Piccard,  relay   governors,    105,   158,

293,  305
Pipes   for  air,   185,  212;    joints  for,

187 ;  loss  of  pressure  in,  222,  238
Pipes  for  pressure- water,  131  ;  friction

in,  133;   strength   oC,  134;    joints

for,    135;    weight   and    cost,    136;

steel,  135,  162;  joints  for,  135
Pipes  for  steam,  249 ;    variators  for,

250

Pneumatic  transmission,  163
Polyphase  systems,  284
Popp  compressed  air  system,  164
Portsmouth  Dockyard  compressed  air

system,  70,  197

Preller  on  Berne  tramways,  204
Pressure  engines,  hydraulic,  96,  139,

152,  158
Proll,   combination  of    gas  and    air

motors,  193
Pulleys  for  rope  transmission,  113


RAFFARD  coupling,  160

Reheating  compressed  air,  191,  233

Relay,  hydraulic,  167

Reservoir  storage,  92,  130,  149,  151,
156

Reuleaux,  Prof.,  rope  transmission,
113

Riedler,  Prof.,  valves,  162,  183 ;  com-
pressors, 201,  229 ;  experiments  on
Paris  mains,  217;  experiments  on
efficiency  of  compressors,  231 ;  ex-
periments on  efficiency  of  motors,
235

Rieter  Brothers,  brake  for  turbines,
107;  rope  transmission,  110,  115,
122,  127 ;  turbines,  291

Rigg,  A.,  hydraulic  motor,  97

Rope  transmission,  108  ;  at  Oberursel,
115;  at  Ochta,  116;  at  Schaffhausen,
116;  at  Fribourg,  122;  at  Belle-
garde,  124;  at  Gokak,  124;  at
Genoa,  291

Rotary  motors  at  Paris,  190

Rysselbergh,  von,  hydro-electric  sys-
tem at  Antwerp,  161


SANKEY,   Capt.,   steam   consumption

with  variable  load,  52
Savage  on  Terni  works,  165
Schaffhausen,   rope   transmission   at,

81,  116;  electric  transmission,  122
Schmid  motors,  96,  158
Schwoerer,  E.,  superheater,  33
Secondary  batteries,  71


312


DISTRIBUTION   OF   POWER


Shone,  I.,  sewage  system,  164,  207
Siemens,  A. .continuous  and  alternate

current  systems,  287;  series  system,

282

Siemens,  Dr. \V.,  on   electric  trans-
mission, 263
Societe  Cockerill,  use  of  compressed

air,  195

Solignac  on  compressed  air,  168,  185
Steam    consumption   in   engines,  23;

curves  of,  46 ;   with  variable  load,

52

Steam  distribution  in  towns. 245
Stockalper,  experiments  on  air  mains,

212. 220

Storage  of  energy,  67,  90,  130
Subways  for  electric  mains,  280,  307
Superheating,  26,  32
Swain,  G. F.,  water  power  in  America,

83


TELLURIDE  electric  installation,  265,
295

Telodynamic  transmission,  108,  126

Ternfsteel  works. 165,  198

Tesla  motors,  283,  296

Testing  flume  at  Holyoke,  87

Thermal  storage,  72 ;  cost  of,  74  ;  use
with  destructors,  78 ;  use  at  gas-
generating  stations,  78

Thomson,  Prof. 