The Bookshelf for boys and girls Book of Wonders and Curious Things (1912)
University Society, New York · New York: University Society · leaf 91
into the bottle, the more forcibly will the corkrush from its place in the neck. Instead of acork, the experiment may be successfully triedwith a small ball of pith, or with one of paper. THE MAGIC TRIANGLE A very interesting experiment may be performedas follows: with a wet lead-pencil point draw… … it on the surface of a basin of water with thedrawing up, and very carefully fill the space in-side the dampened lines with water, so that therewill be a triangular basin of water on the swim-ming sheet of paper. (The water will not ex-tend beyond the wet lines of the drawing.) Now,taking a pin or…
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