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Weapons and Implements
The Classical Period
The Mediaeval and Early Modern Period
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acoustics Alhazen amber angle apparatus applied Archimedes Aristotle atoms attraction ball body brass called cathode centre centuries charge Chladni figure circle colour conductor Democritus Descartes described diagram discovered discovery distance earth eclipse Egyptian electricity electron electroscope epoch equal Euclid experiment fact fire flame force Galileo glass Greek Guericke heat Hence Hipparchus Huygens hygrometer idea inches instrument invention iron J. J. Thomson Leyden jar light Lucretius machine magnet mechanics metal method mirror motion needle Newton observed obtained optics paper particles passage physicist physics plate pole produced professor Ptolemy published Pythagoras Pythagorean theorem quantity rays refraction Robert Hooke Royal Society scientists seen Sir William Bragg sound speed Stevinus stone string surface temperature term Thales theorem theory thermal thermometer tone treatise tube vacuum velocity versorium vessel vibration Vinci waves weight wire words