The Croonian Lecture: On the Adjustment of the Eye to See Objects at Different Distances (Classic Reprint) - Hardcover

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Excerpt from The Croonian Lecture<br/><br/>Finding from these experiments, that the change in the convexity of the cornea was not to be seen distinctly in the micrometer, it became an object to ascertain the degree of change which could in this way be distinctly determined.

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