The Specific Gravity is the relative weight of a body compared to an
equal bulk of some other body taken as a standard. This standard is
usually water, for all liquids and solids, and air for gases.
1. Gold 19.2--{D}ollars {B}uy {S}u{n}dries.--Gold is made into
money. The specific gravity of gold is 19.2;
that is, nineteen and two-tenths. The initial
consonants of the phrase "{D}ollars {B}uy
{S}undries" express through "D" and "B" the
figures 19. The "S" of "Sundries" expresses
the decimal point, and the first subsequent
consonant "n" expresses the decimal two-tenths.