mercurial bath

A bath used in the pneumatic trough in collecting such gases as are largely absorbed by water. mercurial-level, subst. A form of level in which mercury is used. mercurial-ointment, s. Pharm.: An ointment made of mercury, lard, and suet, rubbed thoroughly together. Called also Blue Ointment. mercury. mercurial-pendulum, subst. A compensation pendulum invented by Graham of London, 1700. A jar of mercury is used for the bob or weight. As the pendulum expands, the mercury rises, and by the rise of its center of gravity compensates for the inequality caused by the expansion of the pendulum. [PENDULUM.]