365.]
[Footnote 2: I intended this publication to be a very full and explicit
one, and it was sufficiently so to be perfectly understood by most who
saw it; but some may think I did not sufficiently emphasize the
importance of using the particular kind of chlorophyl which I mentioned.
In a brief communication to the editor of the _Photo. News_, in 1883, I
described some experiments with eosine as a color sensitizer, and then
called attention to the superiority of blue-myrtle chlorophyl for this
purpose, stating that I had not been able to secure such results with any
other kind of chlorophyl, and that a fresh solution from fresh leaves
must be used to secure the greatest possible degree of sensitiveness. See
_Photo. News_, Nov. 1883, p. 747.]
So far as I know, nobody tried the process. Nearly five years later Dr.
Vogel announced that, after eleven years of investigation, he had at last
realized a successful process of this character, and that this new
process of his was the "solution of a problem that had long been
encompassed with difficulty." This publication attracted a great deal of
attention, and gave me occasion to again call attention to my process,[3]
and point out that it was not only the first practical solution of this
problem, but the only truly isochromatic process ever discovered.
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