Oculus artificialis teledioptricus, sive, Telescopium : ex abditis rerum naturalium & artificialium principiis protractum novâ methodo, eâque solidâ explicatum ac comprimis è triplici fundamento physico seu naturali, mathematico dioptrico et mechanico, seu practico stabilitum ... . SyHtagma L Cdput Vh i7,. CAPUTVI. De Natura RefraBionis qu^fit in Lentibm concauis. Oc nimc capite naturam Refra£i:ionis, qiias fit in fpecillis feii Lentiblascavis explorabimus, fiveesefint exuna tantum parceconcav£e,hoceft, plano-concavse, live utrinque^jncmpeconcavo-concava^, asqualicer-itemvel iiiicqualiter,
Oculus artificialis teledioptricus, sive, Telescopium : ex abditis rerum naturalium & artificialium principiis protractum novâ methodo, eâque solidâ explicatum ac comprimis è triplici fundamento physico seu naturali, mathematico dioptrico et mechanico, seu practico stabilitum ... . SyHtagma L Cdput Vh i7,. CAPUTVI. De Natura RefraBionis qu^fit in Lentibm concauis. Oc nimc capite naturam Refra£i:ionis, qiias fit in fpecillis feii Lentiblascavis explorabimus, fiveesefint exuna tantum parceconcav£e,hoceft, plano-concavse, live utrinque^jncmpeconcavo-concava^, asqualicer-itemvel iiiicqualiter, Sit ergo Propofitio X X I^ Theorema. Rudim axharaSehfs wcidem ex cCert mfftperjfickm cmcanjsim l^nth vitn^^habet focum wirtuahm vi primce refra^miis addijiantiam fesqmdiametri^ Itradius DE axi GK parallelus incidens pun£lo E in cavam fupcr-ficicm AEB, Dico vi primas refra<5I:ionis radium DE ita rcfringen-daminvitro, quafi procederet ex G diftantia fcilicet fefquidiametricaviiatis AB. Demonllratio. Producatur enim DE inF , &: ducatur etiam cx^^^^on-ccnrro C cavitacis linea C EI, quse crit perpendicularis: unde angulus ^^inclinationis crk CED , cui per ly. primi Euclid. sequalis F EI^ Debetautcm per Axioma 3. (upra reiradio fieri ad perpendicularcm in vitro , 5S
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Keywords: ., bookcentury1600, bookdecade1680, bookidgric00033125, bookyear1685
