Playtner, H. R. [from old catalog] · Chicago, Hazlitt & Walker · leaf 34
radius at present under discussion,and AW the acting length of the fork. It will be seenthat the shorter the impulse radius, or in other words, thecloser the ruby pin is to the balance staff and the longerthe fork, the easier will be the unlocking of the pallets beperformed, but this entails a…
Clocks and watches
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-70-13.webp)
