Sound, transmission of, [253]
Sound, loudness of, [258]
Sound, diffusion of, [259]
Sound, reflection of, [260]
Sound, concentration of, [262]
Sound, none produced by the heavenly bodies, [255]
Speaking-trumpet, [262]
Specific gravity defined, [135]
Specific gravity of animals, [140]
Specific gravity of the human body, [141]