Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 697
and draw itsdiagonal. We may form a polygon M Pi Q R P, whose sides M Pi, Pi Q, Q R, R P, are parallel andequal to the given components Pi Ps P3 P4, the last side M P completing the polygon will be the meanforce sought, or rather its measure. This simple and elegant theorem is called the Polygon of…
Mechanical engineering
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