L r b. II. C a p. IV. z 19

easdem diametros ordinatim applicata faciant angulos , dato velassumpto angulo AB E aquales : eritque casu utroque centrumHyperboles in puncto A, & scmi-latus transversum »/, quod in

dictis diametris respective per lineas AC vel AF exprimatur.Porro si l sit wAvcl, ^uoä idem est, si termino x x ydjy nulla ad-

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