. De re ichnographica : cujus hodierna praxis exponitur, et propriis exemplis pluribus illustratur : inque varias, quae contingere possunt, ejusdem aberrationes, posito quoque calculo, inquiritur . umprior aequatur angulo bca jam notoj pofterior autemduobusBDo, &odg, nimirum duobus bc a , & hifce itaque datis inveniri poflunt crura fd, gd, &fubtenfa bd. Pro defectibus item bh, bi minorum Iaterum ea,ce habetur in triangulis rectangulis bhe, bie fubteniacommunis be , par alteri contiguaj bd: habetur quoqueangulus ebh aequalisangulo eca prodeuntiex bca, demp-ta iiquidem Aberratione bcej dat
. De re ichnographica : cujus hodierna praxis exponitur, et propriis exemplis pluribus illustratur : inque varias, quae contingere possunt, ejusdem aberrationes, posito quoque calculo, inquiritur . umprior aequatur angulo bca jam notoj pofterior autemduobusBDo, &odg, nimirum duobus bc a , & hifce itaque datis inveniri poflunt crura fd, gd, &fubtenfa bd. Pro defectibus item bh, bi minorum Iaterum ea,ce habetur in triangulis rectangulis bhe, bie fubteniacommunis be , par alteri contiguaj bd: habetur quoqueangulus ebh aequalisangulo eca prodeuntiex bca, demp-ta iiquidem Aberratione bcej datur denique angulusEBiconftans ex duobusEBP, pbi, quorum prior non dif- DE RE ICHNOGRAPHICA, 197 difTert a noto bca, neque pofterior a dato cba. Quarenota fient quaefita crura b h , & b i. Num. IV. Supputantur effeffus fimplicis, & duplicis Aber-rationi$i inalterutroy & in utroque angulo*rum bajinou adjacentium. INchoatur ab exemplis unius Aberrationis in alterutroangulorum ad In triangulo b A c, reclangulo in b , cujusdaturbafis c a oppofita ipfi angulo b, 26^ decemped: & angu-Sus c gr. 59. 37. ^o^j hinc reliquus a 30. j in-veniuntur crura, fi fiat. Uc fin. tot. & ut fin. tot. adbafimcA265 1. itafin. ang. A59°.37. 30I. ad bafim CA265 1. ita fin. Summa Sc 3. Summa & 3«ta ad crus cb 1. ad crus ab 134 1. Si fuerit Aberratio in A + 5 fiec Ut 9*99999 &°.55/l. 9*99999 ad bafim c A 265 1. ita !. adbafimcA. 265 1. itafin. ang. c 30 1. Summa & 3. Summa & 3. adcrusADi34 1. absque ullo exceflu. ad crus ad 228. W- I. 2-35951Error icaque fi ve augm. 20 uniusdecemp: II. In triangulo bca, cujus angulus re«£tus c adja-cet bafi ca, nota fit ipfa bafis 200 decemped. & ang. agr. 605 ideoque fubtenfa ba decemped: 400 & cruscs346: 41;
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