Playtner, H. R. [from old catalog] · Chicago, Hazlitt & Walker · leaf 28
Fig. 12. Fig. 13. or English wheel has several points in its favor. Such awheel is inseparable from a wide pallet; but we haveseen that a narrower pallet is advisable; also as little dropand lock as possible; clearly, we must effect a compromise. 22 THE LEVER ESCAPEMENT. In other words, so far the…
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)
