That diligent enquirer Hero of Alexandria discovered this lately.

In these experiments, however, Leonardo seems to have advanced little beyond Hero of Alexandria and his steam toy.

Such an apparatus was first described by Hero of Alexandria about 200 years b. c. It has often been called the first steam engine.

Automata have lived among us since toga days, when Hero of Alexandria built mini-mechanical theaters whose mythological figures cavorted about on their own weight-and-pulley power.

Hero of Alexandria, who lived in the second century BC, might be described as the Heath Robinson of his generation.

Hero of Alexandria, who lived in the first century before Christ, has described to us several bits of machinery which were driven by steam.

Hero of Alexandria first applied steam to machinery, next a French writer in 1630, the Marquis of Worcester in 1655, Capt.