aes VOLUME XI. NUMBER 22. THE Scientific American, … quickness of taper may be regulated by sim- block of marble, the cuts being madestraight, A pin, 4, is placed on the framing, A, against or on a taper,as may bedesired. Much atten- ply changing the fulcrum of the lever, M. which pin the projection, g’, strikes. N is a tion has been given to this…
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