PLUMBISM n.
is metal or in its compounds, as among painters, typesetters, etc. It is characterized by various symptoms, as lead colic, lead line, and wrist drop. See under Colic, Lead, and Wrist.
PNEUMATIC; PNEUMATICAL a.
r 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 of air. -- Pneumatic elevator, a hoisting machine worked by compressed air. -- Pneumatic pile, a tubular pile or cylinder of large diamete…
POISON n.
t 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 (Strychnos Nuxvo…
POND n.
d genera. The operculated species are pectinibranchs, belonging to Melantho, Valvata, and various other genera. -- Pond 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…