ing the Davis Island dam, series of balls. During the rotation of the worm the arena by mechanical means and opened automatically, which was completed in 18Ji,j. The new dams, like the balls travel freely along the usual pitch-line and bear and how the great awnings were warped across the Davis… … Fig. 3.—AN ODD MECHANICAL TOY. Fig. 2.—A BALL-BEARING WORM GEAR. would give vessels ot 3,000 tons or more free passage between Lake Erie and Pittsburg at the expense of cover illustrates a half-timbered house at Greenwich, Jones substitutes rolling friction for the usual sliding Pittsburg capital.…
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