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A third apparatus [from Hero] was merely an elaboration of the second, in that the sphere was connected with an altar which supported a large drum on which were figures representing human beings. The fire being lighted, the sphere would soon begin to revolve, and with it the drum; and the figures on it would seem to dance around, above the altar. The invention was probably to impress the people with the idea that the priests were exerting supernatural power.

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Invention
The Master-key to Progress
Author: Bradley A. Fiske
Available from www.gutenberg.org
Published in 1921

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Wednesday 3 November 2021

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Invention

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