Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 333
Fig. 688. Again, in column 5, multiply 5*07 X 2-5 = 12675, and from the centre,with this radius, describe another circle for the paths of centres of flanks of theteeth, from column 6, 1*34 x 2*5 = 3*35, the radius of the flanks of the teeth. For the height of a tooth a common proportion is -^^ of…
Mechanical drawing
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