Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 107
e point from 1 to2 is the same as that corre-sponding to the motion of thepoint around the area, since thewheel returns backward to itsinitial position during the mo-tion 1-2. In Fig. 53, the motion 1-2of the point causes a change ofposition of the wheel from 5 to 6.The line 6-7 is the component… … Fig. 53 15 PLANIMETERS 87 diagram, and c the length of the planimeter arm (see Test 14,principles). Also, area = /iXZ in which h is the mean height and I the length of the diagram. Hence McMc = hl, from which h = —j-. From the similarity of triangles 1-3-4 and 6-7-5, -yr =~j J from which S = —j-.…
Mechanical engineering laboratories
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