Soap Bubbles
and the Forces which Mould Them

Forfatter: F. R. S., A. R. S. M., C. V. Boys

År: 1890

Serie: Romance of Science Series

Sted: London

Sider: 178

UDK: 532

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Side af 193 Forrige Næste
PRACTICAL HINTS. I hope that the following practical hints may be found useful by those who wish them- selves to successfully perform the experiments already described. Drop with India-rubber Surface. A sheet of thin india-rubber, about the thickness of that used in air-balls, as it appears before they have been blown out, must be stretched over a ring of wood or metal eighteen inches in diameter, and securely wired round the edge. The wire will hold the india-rubber better if the edge is grooved. This does not succeed if tried on a smaller scale. This ex- periment was shown by Sir W. Thomson at the Royal Institution. Jumping Frame. This is easily made by taking a light glass globe about two inches in diameter, such, for