1 3 < 5 Element . oculum ad A , iddi , centrum Instrument ! & dirigereguiam versus verticem turris ü tamdiu , doaec iliacum tuo radio visuali coincidat : tunc bare regula in circumft . rentia instrumenti rotabit gradus anguli BAD : Est enim circumferentia instru - ' … menti in gradus divisa . Postea muta fla * tionem , & progredere in loco plano ad 10 , ulnas ( vel prolubitu in quavis alia distan tia ) usque ad C , & ibi denuo cape al um angulum BCs ) ,c ujus ope habebis angu lum deinceps Ii C A , quia hi ' duo simul fututi atqual - ssunt duobus rectis : & sic…
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