The hydraulic automatic of Hercules the archer and of the dragon’s hiss

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The hydraulic automatic of Hercules the archer
and of the dragon’s hiss


A reconstruction of the conception of Heron of Alexandria representing Hercules launching an arrow against a dragon that hisses when being hit. If the viewer of the automatic raises the apple that lies in the middle of the platform then, by concealed chain, the hook in Hercules' hand will be released and the arrow will be launched while the valve, which encloses the bottom of the upper container, will be raised and the water will penetrate the intermediate container forcing air to leave the built-in tube of the dragon giving a sense of death's hiss.

SOURCES: ''Heron of Alexandria, Pneumatics, A41''