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Book from Project Gutenberg: The Boy's Playbook of Science Including the Various Manipulations and Arrangements of Chemical and Philosophical Apparatus Required for the Successful Performance of Scientific Experiments in Illustration of the Elementary Branches of Chemistry and Natural Philosophy The properties of matter: impenetrability -- Centrifugal force -- The science of astronomy -- Centre of gravity -- Specific gravity -- Attraction of cohesion -- Adhesive attraction -- Capillary attraction -- Crystallization -- Chemistry -- Chlorine, iodine, bromine, fluorine -- Carbon, boron, silicon, selenium, sulphur, phosphorus -- Frictional electricity -- Voltaic electricity -- Magnetism and electro-magnetism -- Electro-magnetic machines -- The electric telegraph -- Ruhmkorff's, Hearder's, and Bentley's coil apparatus -- Magneto-electricity -- Dia-magnetism -- Light, optics, and optical instruments -- The refraction of light -- Refracting optical instruments -- The absorption of light -- The inflection or diffraction of light -- The polarization of light -- Heat -- The steam-engine.