De rerum varietate, libri XVII . lo propofito exadti ^quale. Sed ad mechanicaredeo,dcfcribsimus autem duos modos , quibusconftruipoiTuntfer^portarum,utadomefticisfolumpoflint aperiri, abaliisminime : utex his innumerabiles uariosq;,abhis pofTis excogita-re. Sit igkur a annulus iun&us baculo ferreo : folido b c , annulus aliusc d, in cuius medio b c circumagi-tur(quiarotundus necannulo iun-dus) mtra poftes efl, a autem autem baculusipfi c d,d e uero cftlamina ferrea iu-daannulo CD,ut circua&o annuloeleuetur,per fe aute fponte decidat,decidit aute fuper r uncu ferreum al t
De rerum varietate, libri XVII . lo propofito exadti ^quale. Sed ad mechanicaredeo,dcfcribsimus autem duos modos , quibusconftruipoiTuntfer^portarum,utadomefticisfolumpoflint aperiri, abaliisminime : utex his innumerabiles uariosq;,abhis pofTis excogita-re. Sit igkur a annulus iun&us baculo ferreo : folido b c , annulus aliusc d, in cuius medio b c circumagi-tur(quiarotundus necannulo iun-dus) mtra poftes efl, a autem autem baculusipfi c d,d e uero cftlamina ferrea iu-daannulo CD,ut circua&o annuloeleuetur,per fe aute fponte decidat,decidit aute fuper r uncu ferreum al teri LIB. XIII. CAP. LXIII. 63? tcri pofti infixum, g h pars ianua: in qua annuli. Itaq; cuma circunducitur,non mouet c d, tum propter pondus d e,tumquiaaunexusbaculusnoneftipfi cd. CumueroGH,impellitur,uehementer e adha?retr, ideoq;, nonpoteltelcuari d e : cum autemmediocriter , b adhxret c d , el-e-uaturannexum cd , & de lamina, aperiturque &. trahendo uehementcr , & non trahendo,immobilis manet
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