250 'Thyfic. Gen. T>ifp-V 1 1. de principiis JMechunices , cani contento fufpendi 3 gravitate aeris externi faltlm mediate ? quatenus ea gravitate aeris intra Machinam corsclufi elater fuit tam valide fenilis , ut Mer¬ curii in tubo vitreo memorato contenti gravitas non fit fatis valida ad majorem…
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