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Rabdologiae (1617)

Napier · leaf 161

An illustration from Rabdologiae, 1617, leaf 161
-iìe pmebit, VtfintmuJtfplicancfa i9 (qua: tran/Iatifiuni: a b e)in 13: qiwa-ar.flatafiunr a ea. Calciìlisatit creta fìgnentur a b e vel■fui numeri i,a, ró, in infimo & finiitr©margine V^acd vero, vel fui numeri1,4, b,m dextro T ® figoentur.utinfra,Deinde omnrscommuncs anelili inter… … J CAPVT DECtMVM, J39 cantis & multiplicandi, qua? priusappcne-bantur: abbrevianda ettfumma quadrali-gali arealiSj &r trahfpòrìétidf fui ealculi*hoc modo : calculum arealem in angolocommuni inter i & i, trarifpone in mar-gìoem i dextrorfum : calculum inter Z&r 2, in numerimi mai…

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