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Rowland himself, however, undertook to provide a remedy. Aided by Lewis E. Jewell, he redetermined, at the Johns Hopkins University, the wave-lengths of about 16,000 solar lines, photographing for comparison with them the spectra of all the known chemical elements except gallium, of which he could procure no specimen.
The plague of darkness had lifted after fifteen minutes' duration. "Call Monsieur X," he gasped to the day operator. In fifteen minutes, by rapid substitutions of batteries to weaken or strengthen the sending current, he had redetermined his previous data. Apparently, without the shadow of a doubt, Monsieur X was within the circle. "He may be at sea," suggested the operator.
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