stanhope
... that in 1864, René Dagron produced a stanhope which enabled the viewing of a microphotograph that included the portraits of 450 people in an area of 1 mm2?
... that in 1864, <a href="./René_Dagron" id="mwF9k" rel="mw:WikiLink" title="René Dagron">René Dagron</a> produced a <b id="mwF9o"><a href="./Stanhope_(optical_bijou)" id="mwF9s" rel="mw:WikiLink" title="Stanhope (optical bijou)">stanhope</a></b> which enabled the viewing of a <a href="./Microform" id="mwF9w" rel="mw:WikiLink" title="Microform">microphotograph</a> that included the portraits of 450 people in an area of 1<span id="mwF90" typeof="mw:Entity"> </span>mm<sup id="mwF94">2</sup>?