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 telegraph systems between the continents and all these floating cities are well nigh perfect. Fast lines of mail steamers follow one another around the same course pursued by these floating cities, and passengers can go to or from any of these moving abodes to any part of any continent whenever they wish; so that if a dealer wishes a vehicle of special design, he can send his order by mail to any one of the six vehicle cities and have it completed by the time the floating city arrives at his port. If the community receiving the order cannot complete the work in time, the order is sent with one of the mail steamers to the next vehicle city in line.

The massive city starts its journey and in one day it floats to the coaling stations. Here it takes on board an ample supply of fuel and proceeds along the regular course, making no stops until it reaches the mineral station where it takes a new supply of the various kinds of metals necessary for manufacturing and for all other purposes.

Then perchance it passes a city or two that is lying in dock for trade purposes. The