oted the back end of a metal box having two different sized models, some of which were nearly half to which the T square is attached. Secured to each parallel longitudinal slots, through one of which the a ton in displacement.” slide is a cord, which is led ove® guide rollers to a bar passes, while… … age. ‘ Magnetic Clock. A‘curious application of the magnet is described in straight edge (the construction of which is clearly per view, the shank and its movable jaw may be slipped a French journal, the subject of it being a clock re- | shown in the center of the large view), which can be cently…
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