Here are some additional sources to accompany the CC April article “Looking at Looking Glasses”.
Examples of Looking Glasses
A search for looking glasses at the MFA, and for Mirror
From the NYPL: an 1826 illustration, 1826 cabinet and looking glass, carved frame 1852, Illustrations from Chippendale’s ornaments, 1840, photo of a Queen Anne Mirror, mirrored chest of drawers (photo taken 1923) , “early 19th century mirror”, 18th c. mirrors, Chippendale mirror, Girandole, 3 early 19th c mirrors, pair of early 19th c. girandoles, 1826 illustration of dressing glasses, drawing room chimney glass, 1826 looking glass, 1826 cheval looking glass, 1826 dressing table and dressing glass
Art & Manufacture
I suggest looking at US and British patent information regarding the making of and improvements in looking glass manufacture.
Science
The effect of the common looking glass explained.
Superstition & Folklore
If I Had My Own Blue Box: 
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