American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 115
oint A, and, witha plumb-line, drew the line A E ; then fromthe point B, drew, in like manner the line BF, which gave, at the intersection of the lineC, the Cf litre of gravity, at which point Ifixed, on tne inside of the ball, a small pieceof brass. From this point, and causing theball to rest… … D. I then compensated for the whole lengthof the pendulum rod. This was as nearlycorrect as I could make it.The irregular expansionof the metals made somelittle inaccuracy, but thiswas very slight. The rodswere carried through theupper cross-head, andlikewise through the lowerone ; and, although I…
Clocks and watches
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-299-32.webp)
