For reading the delicately engraved marks and figures on the silver, microscopes are necessary.
"The Story of the Heavens"
Robert Stawell Ball
If they was a pair o' patent double million magnifyin' gas microscopes of hextra power, p'raps I might be able to see through a flight o' stairs and a deal door, but bein' only eyes, you see, my wision's limited.
"The World's Greatest Books, Vol III"
Arthur Mee and J.A. Hammerton, Eds.
He will not succeed, unless his microscopes be much better for his size than ours are for ours.
"A Budget of Paradoxes, Volume II (of II)"
Augustus de Morgan