Certein bodies... become luminous when heated. Their luminosity disappears after some time, but the capacity of becoming luminous afresh through heat is restored to them by the action of a spark, and also by the action of radium.
Related Keywords: Spark Capacity Through Heat Become Them Some
Related Authors: Isaac Newton Immanuel Kant Johann Wolfgang von Goethe Galileo Galilei Rene Descartes Pope Francis Nikola Tesla
