PNEUMATIC; PNEUMATICAL a.
neumatic lever (Mus.), a contrivance for overcoming the resistance of the keys and other movable parts in an organ, by causing compressed air from the wind chest to move them. -- Pneumatic dispatch, a system of tubes, leading to various points, through which letters, packages, etc., are sent, by the flow and pressure…
POISON n.
rica. It is common on stone walls and on the trunks of trees, and has trifoliate, rhombic-ovate, variously notched leaves. Many people are poisoned by it, if they touch the leaves. See Poison sumac. Called also poison oak, and mercury. -- Poison nut. (Bot.) (a) Nux vomica. (b) The tree which yields this seed (Strychno…
POND n.
spice (Bot.), an American shrub (Tetranthera geniculata) of the Laurel family, with small oval leaves, and axillary clusters of little yellow flowers. The whole plant is spicy. It grows in ponds and swamps from Virginia to Florida. -- Pond tortoise, Pond turtle (Zoöl.), any freshwater tortoise of the family Emydidæ. N…
PROTOMETALS n.
protochromium, protocopper, protonickel, protosilicon, protostrontium, prototitanium, protovanadium. -- Pro`to*me*tal"ic (#), a.