> For example, you could not use human power to drive most of the things we drive with engines: cars, trains, ships, planes, etc. True, but not relevant to the

> For example, you could not use human power to drive most of the things we drive with engines: cars, trains, ships, planes, etc. True, but not relevant to the initial, successful commercialisation of the technology. The mobile power plants are a whole step beyond the "lets mechanize labour". Newcomen engine: 1712, Stephenson's Rocket 1829.