Sentence:  [E]very Ray ſtreaming out of a viſible point, is propagated in a direct line; ſo that the Object is <WSD>everted</WSD>, if the Rays do not ſuffer an Interſection, either before or behind the hole, which would not happen, if the Rays were not carried in right Lines, but refracted; [...] 
Meaning of the word marked with <WSD> tags:  To turn upside down; to overturn.