Chapter XXXIX: =the Mechanical Powers.=

=Power= 405
=Lever= 405
The principles of 405
Wheels and pulleys considered as levers 405, 406
Power transmitted by gear wheels and pulleys combined 407
=Horse Power= 407
Calculating the horse power of an engine 407
Testing the horse power of an engine 408
=Safety Valve Calculations= 409
=Heat= 410
Latent heat 410
=Water= 410
=Steam= 410
Saturated 410
Superheated 410
Expansion of 411
Absolute pressure of 411
Weight of 411
Volume and pressure of 411
=Heat= 411
Conversion of heat into work 411
Joule's equivalent 411
Mechanical equivalent of heat 411
Mariotte's law 411
Radiation of heat 412
Conduction of heat 412
Convection of heat 412