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Hydroscope, hī′dro-skōp, n. a kind of water-clock, consisting of a cylindrical graduated tube, from which the water escaped through a hole in the bottom.

The former was a hydroscope, who fell into convulsions whenever he passed over running water.

The muscles which would contract the fingers upon the arms of the stick, pass the shoulder; and it is worthy of remark that one of the medical men who witnessed the experiments made on Bleton the hydroscope, expressly alludes to a slight rising of the shoulders during the rotation of the divining rod.

He calls it a hydroscope and describes it as having the form and size of a flute, and graduated in such wise that it can be used for determining the density of liquids.

For the preliminary work of treasure finding, he perfected his hydroscope, a kind of sea telescope consisting of a floating platform from which depend a series of tubes ending in a chamber equipped with electric lamps, lenses and reflectors, like so many gigantic eyes through which the observer is able to view the illuminated bottom of bay or ocean.