. Guilielmi Gilberti Colcestrensis, medici londinensis, De magnete : magneticisque corporibus, et de magno magnete tellure; physiologia noua, plurimis & argumentis, & experimentis demonstrata . dcclinansinmaioreiatitudiaekbitur vltra poltim. Intcrtia ver8pofitione terrelte, ferrum eft perpendiculare 5 quidpoluslapidis infummo pofituseftj &ferrum dire&everfus corpus tendenspolumattingit, Cruxin praecedentibus figurisfemper inborealemterrellgpolum conuertitur, ta&us a boreali terrella* polo, cufpis ta&usme-ridionali lapidis, in auftrinum tendit. Itd videre licet aequabilcm^obliquam, & perpendicu
. Guilielmi Gilberti Colcestrensis, medici londinensis, De magnete : magneticisque corporibus, et de magno magnete tellure; physiologia noua, plurimis & argumentis, & experimentis demonstrata . dcclinansinmaioreiatitudiaekbitur vltra poltim. Intcrtia ver8pofitione terrelte, ferrum eft perpendiculare 5 quidpoluslapidis infummo pofituseftj &ferrum dire&everfus corpus tendenspolumattingit, Cruxin praecedentibus figurisfemper inborealemterrellgpolum conuertitur, ta&us a boreali terrella* polo, cufpis ta&usme-ridionali lapidis, in auftrinum tendit. Itd videre licet aequabilcm^obliquam, & perpendicularem ferri magnetici pofitionem in ter-rella. CAP. IL Diagramma declinationum ferri magnetici exciti^in Varijs Jphterte po/itionibus, & hori^ontibustelluris, in quibus nulla eft AB GVILIEL. GILBERTIEquator A B, C pplus ardicus,D antar&icus, E Gdeclinatia magneticainfeptentrionali, H F in au-ftrali telluris aut terrellas parte. Inifto dia°ram-mate cufpides omnes funt tadse ab Ardico veroterrellse polo. Talis eft aequilibratio ferri magnetici in A & Baquatore telluris&lapidis,*& perpendicularitas in C D poljsjinmedijs vero locis 45 graduum interuallo verfus auftrum crucesferri declinant; Verfus Boream ver6 cufpides tantundem. Cuiusrei ratio ex fequentibus demonftrationibusinnotefcet. Diagramma conuerfionis declinationifquc terrellae ad terreniglobi normam^ro latitudine bonali ^ograduum.
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