has a crank extending into the Ducos du Hauron. surrounded on three sides by balconies. Com- It has been known for a long time that the sensation munication with the tops of these towers will be by lifts as well as by staircases, and they of relief and of aerial perspective is due to binocular… … power dynamos, and of these also it is caleu- Fig. 1—EYEGLASSES FOR EXPERIMENTING WITH , lated that one will be sufficient, and the other ANAGLYPHS, W\ merely in reserve. The electric force for these dynamos will be supplied by Messrs. G. C. an identical manner, and it is from the sensorial super-…
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