Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 126
is exactly at right angleswith the plane of the beam. The lower edge of the prism issharp, and rests upon an agate plane, so as to make the friction assmall as possible. For the same reason, the hooks by which thepans are suspended rest also on knife-edges. These knife-edges GENERAL PROPERTIES OP… … Jig. 12. when in equilibrium the beam will tend to come to rest in ahorizontal position. The centre of gravity can be adjusted bymeans of the button C, Pig. 42, which can be moved up or downon the screw to which it is fastened. The long index-rod attachedto the beam below the knife-edge indicates,…
Matter · Heat
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