Playtner, H. R. [from old catalog] · Chicago, Hazlitt & Walker · leaf 38
of a width of 1 J/20. Applying it to thepreceding example it would only have an actual widthof .0785 X1.5==. 1178 mm., or the size of an ordinary bal-ance pivot. At n, Fig. 17, we illustrate such a ruby pin;the theoretical and real impulse radius coincide with oneanother. The intersection of the…
Clocks and watches
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