Ceva, Giovanni, Geometria motus, 1692

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1quod fiet ſi A, alterum extremum arcus, ſit propriùs cen­
tro M, quàm ſit concurſus linearum LB, KE.
Idem dicen­
dum de altero extremo N.
Nam cùm minus aperiantur
partes propinquiores puncto A, cætera elateria, vt com­
pertum eſt, meliorem effectum præſtant.
Fauet denique experientia. Nam huiuſcemodi machi­
na pauciſſimis nodis conſtructa, facillimæ curuaturæ, cum
elaterijs eiuſdem prorſus molis & craſſitudinis; nihilomi­
nus longè ſuperauit vim baliſtæ communis maximæ, & dif
ficillimæ flexionis.
Quamobrem non dubito quin, ſi præ­
cepta ſuperiùs data exactè ſeruentur, elaborari poſſit ma­
china miræ vtilitatis.
Adde poſtremo ad iacienda quædam
miſſilia, vt eſt genus quoddam bolidum, vulgo granate, op­
portuniora eſſe brachia lignea, tantummodo, vbi neceſſi­
tas poſtulat, armata ferro.
FINIS.

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