Expansion of air by heat: illustration of demonstration by the Greek engineer Philo of Byzantium (c280-c220BC) also c alled Philo Mechanicus. Sphere contains water and air. Sun's heat causes air to expand and water is forced through tube into flask. Engraving from ''Utriusque cosmi ... historia'' by Robert Fludd, Oppenheim 1617-19.

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Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
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Keywords: ..., 17th, air, byzantium, century, cosmi, demonstration, engineer, engraving, fludd, greek., heat, historia, illustration, mechanicus, oppenheim, philo, physics, power, robert, solar, sphere, utriusque, water