Page:Organum mathematicum libris IX. explicatum (1668).djvu/691

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Tabula II. Tangentium distantiarum Horarum, a meridie et media nocte in AEquinoctiali, pro Horologiis Meridianum, Orientalibus et Occidentalibus.


NOtandum, Tangentes horarum ac semihorarum post sextam, si utraque aequaliter a sexta distent. Itaque Tangens horae 5 ½ ante sextam matutinam, est 131, vel  ; vel Tangens horae 5 ante eandem sextam, est 268, vel 2 . Idem dicendum est de horis post sextam vespertinam: nam hora 5½ et hora 6½, habent eandem Tangentam 131, vel 1 ; et hora 5 ac 7, eandem Tangentem 268, vel 2 . Itaque pro Horologio