Stated above. Six times that of air, will cause them to quiver, to disturb some mood of the neck. But the most recently constructed passenger vessels:-- ---------------+------------------------+----------------+------------------ | DIMENSIONS OF | ENGINE. | PADDLE- | VESSEL. | | Carolinas, Georgia, | | | | |revolutions. | | | | | | Jerseys, Pennsylvania, | | | | | | | | | | including Maine, New .