Emerson, William, 1701-1782 · London : Printed for J. Nourse · leaf 85
PlJIVyV- … piJH/.^/^. Sea. IV. MECHANIC POWERS. 75 and hollows, that run round it in a fpiral manner Fig,from one end to the other, at equal diftances -, 45,.thefe rifings are called threads, and fo many revo-lutiojis as they make, ib many threads the fcrewcontains. CD is the female fcrew, or the plate,thro…
Mechanical engineering
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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-essaidephysiquep01muss-207-50.webp)
