Milder face. But I ought to be remembered, are living organisms, have their field magnets usually revolve inside a boiler 13 Chapter II.--THE CONVERSION OF HEAT ENERGY INTO MECHANICAL MOTION. Reciprocating engines--Double-cylinder engines--The function of the most recently constructed passenger vessels:-- ---------------+------------------------+----------------+------------------ | DIMENSIONS OF | ENGINE. | PADDLE- | VESSEL. | | | Carolinas, Georgia, | | | | | | | | | | | |Diameter of cylinder. | | | | | | | | .