ms, with line AB. Gorrespondence. To find angles, BAc’, ABd, and length of link, E. Ike Editors are not responsible for the opmions expressed by their Cor- 1. As the length of arm, D, is to the chord of arc, ab, divided respondents. by 2,s0 is the radius to the sine angle oscillation of arm, D, di… … ly enough, a simple method by which this could be shown. 3. Now arc ab is equal to arc ac’. Your correspondent claims that the calculation, according to 4. The whole circumference is to 360° as the length of arc my own rule, gives a figure of a totally different form, and a’e’ is to the angle…
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