Transactions of the american philosophical society, hold at Philadelphia, for promoting useful knowledge

Transactions of the american philosophical society, hold at Philadelphia, for promoting useful knowledge

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Jan T. Hallenbeck, Benjamin Franklin. NAd XXIV. An Optical Problem, proposed by Mr. Hopkinson, and solved by Mr. Rittenhouse. ... 1786- on t0 tne f0i]owjng problem in optics. ... handkerchief out of my pocket, and stretching a portion of it tight between my two hands, I held it up before my face and viewed, through the handkerchief, ... although I moved the handkerchief to the right and left before my eyes, the dark bars did not seem to move at all, but remained permanent before the eye.


Title:Transactions of the american philosophical society, hold at Philadelphia, for promoting useful knowledge
Author: Jan T. Hallenbeck, Benjamin Franklin
Publisher: - 1786
ISBN-13:

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