Sea water, atomic constitution of, [11]
Self-inductance, [83];
unit of, [83]
Side bands, [248];
relation to wave lengths, [249]
Silicon, percentage in earth, [11]
Sodium chloride, in solution, [19]
Sound, production of, [152]
Speech, to transmit by radio, [230]
Speed of light, [122]
Standard cell, [58]