[Illustration: MECHANICS
“VULCAN, the old stalwart Tubal Cain of Grecian mythology, is the
colossal genius of this group. His right foot rests on a cannon.
Machinery, forges, mortars, and cannon balls, strewn around, remind us
of forging thunderbolts, as well as of combat with, and victory over,
the giant forces of nature, and making them subservient to human will
and purposes.”