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"You may, by all means. You will have considerable difficulty getting it into solution, however. It is attacked only by boiling selenic acid which, as you must know, dissolves platinum readily. The usual test for the element is to so dissolve it, oxidize it to an acid, then test with radium selenate, when a brilliant greenish blue salt is " "Test with radium selenate!" Arcot exclaimed.
If we suppose selenium to be merely modified sulphur, and phosphorus modified arsenic, how does it happen, we must inquire, that sulphuric acid and selenic acid, phosphoric and arsenic acid, respectively form compounds which it is impossible to distinguish by their form and solubility? Were these merely isomeric, they ought to exhibit properties quite dissimilar!
At the supper table Wade and Arcot reported to the others the curious constants they had discovered for coronium. It was not attacked by any acid except boiling selenic acid, since it formed a tremendous number of insoluble salts. Even the nitrate violated the long-held rule that "all nitrates are soluble" it wouldn't dissolve. Yet it was chemically more active than gold.
Of the corona seen around the sun during eclipses, the tendency now seems to be to return to the explanation long ago proposed and discarded; that it is neither telluric, i.e. produced by our atmosphere, nor, strictly or only, solar; but mainly selenic; that is, caused by the rays of the sun being diffracted around the edge of the moon intervening between us and it.
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