And interesting comment, I think, was mentioned in the story and movie,
"Sand Pebbles" When the Motor Mech was teaching the native about the
Steam engine and High Pressure Steam and Waste Heat steam. The Chinese
Trainee got the idea when he named; "Strong Steam and Sleepy Steam"
I've used the terminology in teaching measurement of Steam Flows.
http://community.webtv.net/tassail/ThomPage
http://community.webtv.net/tassail/Pneuma