If any other point 0, whose co-ordinates are x, y, z, be chosen in place of 0, as the point to which the forces are transferred, we have to write x1x, yiy, ZiZ for xl, Yi, z1,and so on, in the preceding process.
1 The coins bearing the name of mm are no longer assigned to Panormus; but certain coins with the name y'S (Ziz; about 410 B.
Shirley, Fasc. Ziz.
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