The economy of the eyes
precepts for the improvement and preservation of the sight. Plain rules which will enable all to judge exactly when, and what spectacles are best calculated for their eyes. Observations on opera glasses and theatres, and an account of the pancratic magnifier, for double stars, and day telescopes
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Word Count
61,500 words, Guess
Page Count
246 pages
Identifiers
- Internet Archiveeconomyeyes00kitc
- OCLC Control Number689567438
- Open LibraryOL25267065M
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