Stevin, Simon, Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis, 1605

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4141*DE* S*TATICÆ ELEMENTIS*. quod Mathematicè quoque ex 22 propoſit. patebit. Quapropter ratio KF
ad FH non eſt alia, quam I ad G.
Ex hifce jam dictis hujuſmodi theoremata deducimus.
12 THE OREMA. 20 PROPOSITIO.
Siaxis columnæ puncta habeat, firmũ, & mobile, & ex
iſto dependentia pondera, unum rectè, alterum obliquè
extollens, in dato ſitu columnam cõſervant:
erit quemad-
modum linea rectè extollens ad lineam obliquè extollen-
tem;
ita illius pondus, ad pondus hujus.
D*ATVM*. AB columna eſto, cujus axis ſit C D, in eoq́ue E punctum fir-
mum, F mobile, cui G pondus rectè extollens appenſum columnam in dato
ſitu ſervat;
indidĕ etiam obliquum pondus H dependens (coërcito vel amo-
to G) in ſuo ſitu eandem detinet.
Latus columnæ à lineâ rectè extollente in I,
ab obliquè extollente in K ſecatur.
Dico igitur quemadmodũ rectè extollens
I F ad obliquè tollentem FK:
ita rectum pondus G, ad pondus obliquum
H.
Proportionis iſtius demonſtratio, ex doctrinâ antecedĕtemanifeſta eſt.
72[Figure 72]

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