Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 231
^r^ 9 … Fig. 98.—Detaclied Levex- Escapement. arrow, the pin Pg will come round and catch against thepoint of the detent, lifting it and releasing the escape-wheel, which will revolve, and the tooth t will hit againstthe stud Pi, giving the balance an impulse. The balancethen swings on to the end of its…
Astronomy · Telescopes
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