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454,200
a" and secured to the spokes a', substantially
as shown and described, and for the purposes
set forth.
5. In combination with a tread, substan-
5 tially as shown and described, upright c, hav-
ing the pivoted arm c', weight cd, and rope c,
working over pulley cl, journaled in a proper
bearing, one end of said rope attached to said
weight and the other to arm c', substantially
io as shown and described, and for the purposes
set forth.
6. The combination of the frame B, having
the beam b, provided with sockets b', and tread-
wheels A and A', constructed and mounted
on axle a2, as described, and having the space 15
a" between them, through which the uprights
C and c may pass, substantially as shown and
described, and for the purposes set forth.
In testimony whereof I affix my signature in
presence of witnesses.
JOHN R. BEVIL.
Witnesses:
J. K. P. MILLER,
J. J. DOLLARD.