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Soap-bubbles : their colours and the forces which mould them : being the substance of many lectures delivered to juvenile and popular audiences with the addition of several new and original sections / by C.V. Boys.
- 541.33 B7931 1912
- Boys, C. V. 1855-1944.
- Society for promoting Christian Knowledge ; E.S. Gorham,
- 1912.
- London : New York :