performer. The effect, however, although pretty, is not quite so startling.
The necessary apparatus consists of a glass tumbler with a small hole drilled in the side one inch from the bottom, the mouth of which must be fitted with a glass cap in the same manner as the tube in the preceding trick. (See Fig. 45.)
Fig. 45.—Hydrostatic Tube The performer having drawn attention to the tumbler, also a small piece of paper, dips the latter into a bowl of water, and lays it down over the glass cap. The tumbler, held with the thumb covering the small hole, is then filled with water from the bowl, and covered with the piece of paper under which, unknown to the audience, is the glass disc. The glass is then inverted and the paper withdrawn, the water remaining suspended without visible means of support. The tumbler can now be turned about in any di-
