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Sel′ēnate, a compound of selenic acid with a base.—adjs.

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.

Selenic acid was discovered by E. Mitscherlich, who also observed the similarity of the crystallographic characters of selenates and sulphates, which afforded valuable corroboration of his doctrine of isomorphism.

It has been discovered by scientists that there is a chemical difference between that sudden cold exudation of a person under a deep sense of guilt and the ordinary perspiration; and the state of the mind can sometimes be determined by chemical analysis of the perspiration of a criminal, which, when brought into contact with selenic acid, produces a distinctive pink color.

It was not attacked by any acid except boiling selenic acid, since it formed a tremendous number of insoluble salts.