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- Author(s):
- Wilcocks, Alexander, 1817-1880 author
- Publication:
- [Philadelphia?] : [publisher not identified], [1858?]
- Subject(s):
- Optical Illusions
Light
Vision, Ocular
- Author(s):
- Langley, S. P. (Samuel Pierpont), 1834-1906, author
- Publication:
- [New Haven?] : [publisher not identified], [1888?]
- Subject(s):
- Light
Photometry
Vision, Ocular