Optice Rorarios, 156 Propofitio XVII. Piam cuiuslibet in auFtrum , vel aquilonem noti direBe obuerfi declinationem , parati iam in&rumcnti bene¬ ficio inuenirt^. Valecunque fuerit planum, cuius inueftiganda proponitur declina¬ a tio , id eft fiue fuerit declinans tantum modo,fiue fimul etiam incli¬… … huius ; applicetur illud quadrati latus quod eidem conuenerit fecundum^ modum declinationis, ita icilicet vt quadrantis centrum Eftemper ad par¬ tem borealem fit, circumferentia vero G H,auftrum relpiciat ; vt hic hne£ I K auplicatur latus A B . Deinde conftituto etiam toto mitrumento ad planum…
Sundials -- Early works to 1800 · Horology -- Early works to 1800 · Perspective -- Early works to 1800 · Horology · Perspective · Sundials
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