Philosophiae naturalis principia mathematica . nfifient. Dentur pontione recbe quatuor^BC, AD7 BF>,CE, qua- rum prima fecet fecundam in A, tertiam in £>, Sc quartam in C: & defcribendum l7t Trapezium fg h i quod fit Trapezio FGHI fimile, &c cujus angulus f,angulo dato F aequalis,tangat reclam^- B C, csteriq; anguli g, 6, i carteris angulis datis G, H, I aequales tangant caeteras lineas AD^ BD^ CE refpeclive. Jungatur FH, & fuper FG^ FH, FI defcribantur totidem circulorum fegmenta FSG, FTH, FVI-s quorum primumFSGcapiatangulumaequa- lem angulo BADy fecundum FTH capiat angulum xqualem an- g

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Philosophiae naturalis principia mathematica . nfifient. Dentur pontione recbe quatuor^BC, AD7 BF>,CE, qua- rum prima fecet fecundam in A, tertiam in £>, Sc quartam in C: & defcribendum l7t Trapezium fg h i quod fit Trapezio FGHI fimile, &c cujus angulus f,angulo dato F aequalis,tangat reclam^- B C, csteriq; anguli g, 6, i carteris angulis datis G, H, I aequales tangant caeteras lineas AD^ BD^ CE refpeclive. Jungatur FH, & fuper FG^ FH, FI defcribantur totidem circulorum fegmenta FSG, FTH, FVI-s quorum primumFSGcapiatangulumaequa- lem angulo BADy fecundum FTH capiat angulum xqualem an- gulo C B E; ac tertium F VI capiat angulum aequalem angulo A C- E. E. Defcribl autem debent fegmenta ad eas partes lineanlm F G>F H, FI, ut literarum F S G F idem fit ordo circularis qui litera-rum By^PB, utq; literse FTHF eodem ordine cum literis CB-E C, & literae FVIF eodem cum literis ACEA in orbem rede-ant. Compleantur fegmenta in circulos, fitq; P centrum circuliprimiFSG, & ^entrumfecundiFTH. Jungatur & utrinq;.

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