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
THE FORCES WHICH MOULD THEM. 139 is not so good as a gas-flame. The narrower these tubes are, the higher will clean water be observed to rise in them. To colour the water, paints from a colour-box must not be used. They are not liquid, and will clog the very fine tubes. Some dye that will quite dissolve (as sugar does) must be used. An aniline dye, called soluble blue, does very well. A little vinegar added may make the colour last better. Capillarity between Plates. Two plates of flat glass, say three to five inches square, are required. Provided they are quite clean and well wetted there is no difficulty. A little soap and hot water will probably be sufficient to clean them. Tears of Wine. These are best seen at dessert in a glass about half filled with port. A mixture of from two to three parts of water, and one part of spirits of wine containing a very little rosani- line (a red aniline dye), to give it a nice colour, may be used, if port is not available. A piece