tibi animusftierit,applicabis oculum ad pundum A tubi A B : Sic ecce tepente tora illa li-nearum multitudine evanefcentc, nihil prjetcr horologium, in quo apex gnomo-nis umbra fua horam perfedeoftendcr,obtutui fcfe offeret. Quas res,fi occulte tra-ctetur, dici vix poteft,quantam in intucntibus… … Cum inHorofcopio iam addudo difficile fit pra£tice ftylum, ficut Author indi-eat, detorquere & incurvare, ut umbra continua projeda exad(^ munus fuum exequivaleat^ potcrit faltem Horofcopium iftqd facilius conflrui,aptando nempe unamareolam, quaccentrum continet,ut lineahbriK 12. e centro…
Optics, Geometrical · Optical instruments
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