electricity, largely supplied by wind, and by the tide turning
their motors, which become dynamos while at anchor in any stream.
They therefore need no bulky boilers, engines, sails, or
coal-bunkers, and consequently can carry unprecedentedly large
cargoes with comparatively small crews. The officers on the
bridge and the men in the crow's nest--the way to which is by a
ladder INSIDE the mast, to protect the climber from the
weather--are about all that is needed; while disablement is made
practically impossible, by having four screws, each with its own
set of automatically lubricating motors.

"This change, like other labour-saving appliances, at first
resulted in laying off a good many men, the least satisfactory
being the first to go; but the increase in business was so great
that the intelligent men were soon reemployed as officers at
higher rates of pay and more interesting work than before, while
they as consumers were benefited as much as any one else by the
decreased cost of production and transportation.

"With a view to facilitating interchange still further, our
Government has gradually completed the double coast-line that
Nature gave us in part. This was done by connecting islands
separated from shore by navigable water, and leaving openings for
ingress and exit but a few hundred yards wide. The breakwaters
required to do this were built with cribbing of incorrodible
metal, affixed to deeply driven metallic piles, and filled with
stones along coasts where they were found in abundance or excess.
This, while clearing many fields and improving them for
cultivation, provided just the needed material; since irregular
stones bind together firmly, and, while also insoluble, combine