Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 374
the position of the rope No. 1, it will be seen that by it the right hand one of DERRICK. >367 these blocks can be raised or lowered by means of the crank, pinion, geer and barrel. No. 1 of thecrab, at the opposite end of the boom; in a similar way, the left hand block is raised by rope No.… … Scale.—6 feet=l inch. •inwards. Again, if rope No. 1 alone be slackened, the weight is lowered and tends inwards, and again ifNo. 2 be slackened, the weight is lowered outwardly ; by these means the stone may be deposited atany spot within reach of the boom.DISC ENGINE. See Engine. 368.…
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-essaidephysiquep02muss-253-53.webp)
