English: The first binocular magnifying glass or simple microscope (German, Lupe) was devised by John Leonard Riddell in 1853; in this instrument the pencil of light is transmitted to the eyes by means of two pairs of parallel mirrors.
Illustration from 1911 Encyclopædia Britannica, article Binocular Instrument
This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.
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