Great facts : a popular history and description of the most remarkable inventions during the present century (1860)
Bakewell, Frederick C. (Frederick Collier), 1800-1869 · New York, D. Appleton and company · leaf 129
and side will be invisible. It isthe combination of both these views by vision withtwo eyes that produces the impression of solidity ofobjects on the mind ; and if the different appearances THE STEREOSCOPE. 113 which the book presents to each eye be copied inseparate drawings, and they can… … ject, as seen by each eye separately. The one on theright hand shows it as seen with the right eye, andthe other as it looks with the left eye; and if bothdrawino;:s be combined into one image, it stands out inbold relief. This may be done without any instrument,by squinting at them ; but the…
Inventions
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