A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 44
from the rest of the movement. In the annexed diagram h represents ^ the barrel-wheel, fur-nished with a ratchetand click to preventthe return of the bar-rel. The wheel hturnsapinion of eightteeth, on the samearbor with whichpinion is the wheeli, turning a similarpinion on the arborof the wheel k.… … h 32 CLOCKS.
Encyclopedias and dictionaries · Aeronautics
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