Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 68
the line A B. Draw the parallel lines A P and B Q,so as to represent the direction and intensities of the two forcesF and F, respectively. In Pig. 10, the forces are supposed toact in the same direction, and in Pig. 11 in opposite directions.The figures have been so lettered, that the following…
Matter · Heat
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