VOLUME 5.] [NUMBER 36. zinc, ABC. A is fixed; B has a lateral mo- THE Scientific American, tion to widen the upper by the screw working CIRCULATION 14,000. in the slot E; C has an up and down slide PUBLISHED WEEKLY. motion by working in the slots, J J, on guide At 128 Fulton Street, New York, (Sun… … This improvement is the invention of Cyrus in length, is now under contract. When this Gaels Borvipte. the ball, D, and in the groove, F, as represent- S. Tolman, of Hinsdale, Cheshire Co., N. H., part of the work isready for use, we shall ed in figure 1. The back part of the slot, G who has taken…
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