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semble platinum. These consist of the light platinum group, viz., rhodium, ruthenium, and palladium, whose specific gravities are about 12; and the heavy platinum group, viz., osmium, iridium, and platinum, whose specific gravities are over 21. -- Platinum sponge (Chem.), metallic platinum in a gray, porous, spongy fo…

trong paper filled with a composition of niter, sulphur, and mealed powder, -- used principally to ignite the priming in proving guns, and as an incendiary material in shells.

nd provision; discretion; carefulness; hence, also, economy; frugality. Prudence is principally in reference to actions to be done, and due means, order, seasons, and method of doing or not doing. Sir M. Hale. Prudence supposes the value of the end to be assumed, and refers only to the adaptation of the means. It is th…

ore confidence to; to free from fear or terror. They rose with fear, . . . Till dauntless Pallas reassured the rest. Dryden.

To look toward; to front upon or toward. [Obs.] Palladius adviseth the front of his house should so respect the Sir T. Browne.

arance of the tide itself. It is found, in general, that any particular tide is not principally due to the moon's transit immediatelly proceeding, but to a transit which has occured some time before, and which is said to correspond to it. The retard of the tide is thus distinguished from the lunitidal interval. See und…

A cylinder coated with a composition made principally of glue and molassess, with which forms of type are inked previously to taking an impression from them. W. Savage.

The pallah.

the wheel in an escapement (as of a clock or a watch) into the teeth of which the pallets play.

An instrument, principally used in cupping, containing several lancets moved simultaneously by a spring, for making slight incisions.

A genus of fossil trees principally found in the coal formation; -- so named from the seallike leaf scars in vertical rows on the surface.

A plaster or poultice composed principally of powdered mustard seed, or containing the volatile oil of mustard seed. It is a powerful irritant.

Wanting a cover, pretext, or palliation; unreasonable; profitless; bootless; useless. [Obs.] Shak. The vexation of a sleeveless errand. Bp. Warburton.

ufacture in which the brick is carried to the drying ground in a wet mold instead of on a pallet.

To palliate; to gloze; as, to smooth over a fault.

To palliate; to represent as less enormous; as, to soften a fault.

e first four of which were found near the beginning of the century, and are called Ceres, Pallas, Juno, and Vesta.

A splinter or fragment, as of wood or stone. See Spall.

In the organ, a small wooden rod which connects (in part) a key and a pallet, so as to communicate motion by pushing.

The mantle, or pallium, of a bird.