Scientific amusements . Fig. 30.^The Grape-seed in the Glass of Champagne. ^ surface of the wine, where the bubbles burst/and the seed will fall to the bottom of the glass seed in this instance has been raised to the surfaceby the aid of the air-bubbles, which play the part of littleballoons in bringing it to the top of the liquid (Fig. 30). HOW TO MAKE A SYPHON WITH A COMMON BOILEDLOBSTER. Take a glass filled with water, and attach a lobster toit, plunge the tail as far as possible into the liquid, letting HYDROSTATICS. 41 the body and head hang over the side of the g
Scientific amusements . Fig. 30.^The Grape-seed in the Glass of Champagne. ^ surface of the wine, where the bubbles burst/and the seed will fall to the bottom of the glass seed in this instance has been raised to the surfaceby the aid of the air-bubbles, which play the part of littleballoons in bringing it to the top of the liquid (Fig. 30). HOW TO MAKE A SYPHON WITH A COMMON BOILEDLOBSTER. Take a glass filled with water, and attach a lobster toit, plunge the tail as far as possible into the liquid, letting HYDROSTATICS. 41 the body and head hang over the side of the glass ; it isnecessary also to cut the antennae, so that they shall nottouch the vessel on which the glass of water stands. Themoment that the lobster is hooked on to the edge of theglass, small globules of water will be seen to form at the. Fig. 31.—The Ldbster Syphon. end of the antennae, which eventually form themselves intoa trickling stream, which lasts as long as the tail of thelobster remains immersed in the water. TO MAKE A NEEDLE an ordinary needle and put it upon a fork, and 42 DENSITY, HYDROSTATICS, ETC. slowly lower the fork into a tumbler of water ; the needlewill then float just like a piece of straw. The reason ofthis is that a meniscus, or bed, convex on one side, andconcave on the other, is formed upon the surface of thewater ; and the surface of this meniscus being large in
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
