Specific Gravity

Specific Gravity, the weight of a body compared with another of equal bulk taken as a standard, such as the weight of a cubic inch of water.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Spasmodic School * Spectrum
Spalato
Spalding
Spallanzani, Lazaro
Spandau
Spanheim, Friedrich
Spanish Main
Sparks, James
Sparta
Spartacus
Spasmodic School
Specific Gravity
Spectrum
Spectrum Analysis
Speculative, The
Spedding, James
Speke, John Banning
Spence, Joseph
Spencer, Herbert
Spencer Gulf
Spener, Philip Jacob
Spenser, Edmund