Page:The Diothas, or, A far look ahead (IA diothasorfarlook01macn).pdf/15

 arcade, that a story below. A short walk along the colonnade on which we had first emerged brought us to a contrivance subserving the same purpose as our elevators. This, like all the similar contrivances throughout the city,—and they were found everywhere at short intervals,—worked automatically, by an ingenious application of force derived from the rise and fall of the tide in the harbor.