=THE INDICATOR.=
=Computations from Indicator Diagrams= 413
=Indicators= 413
Description of 413
Thompson indicator 413
Tabor indicator 413
Diagrams 414
Admission of steam to indicator 414
Expansion line or curve 414
Exhaust line 414
Back pressure line 414
Atmospheric line 414
Theoretical diagram 414
Compression line or curve 415
Condensing engine diagram 415
Vacuum line of indicator diagram 415
(Barometer, construction of) 415
(Barometer, graduation of) 416
Indicator springs 416
Tables of springs for indicators 416
Attachment of indicators to an engine 416, 417
Pantagraph motions 417
Expansion curve, testing of 417, 418
Theoretical expansion curve 417, 418
Calculations from diagrams 418 to 421
Horse power 418, 419
Area 419
Rule for calculating horse power 419
Mean effective pressure 420
Steam used in engines 420
Water consumption 420, 421
Defective diagrams of engines 421
Excessive lead of engines 421
Theoretical compression curve of engines 422