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Updated: May 18, 2025
In the spring of 1893, Professor Hale attacked the problem of coronal daylight photography, employing the "double-slit" method so eminently serviceable for the delineation of prominences. But neither at Kenwood nor at the summit of Pike's Peak, whither, in the course of the summer, he removed his apparatus, was any action of the desired kind secured.
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