ractically inde- order to give the sphere an attractive appearance, the instruments used by the carpenter and builder above outside is mapped off and painted like a large terres- referred to. trial globe. The next experiment was to ascertain if this organ could be influenced by any force other than… … one side. You will find it most dif- Fig. 3,— Section of a parabolic floor. ficult to walk in a straight line Fig. 5.—This picture shows how the rotating parabolic floor will ap except very slowly. A cyclist rid- ing horizontally from a vertical surface. ing in the direction of revolution slowly…
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