PNEUMATIC; PNEUMATICAL a.
produced by compressing a gas will ignite substances. -- Pneumatic trough, a trough, generally made of wood or sheet metal, having a perforated shelf, and used, when filled with water or mercury, for collecting gases in chemical operations. -- Pneumatic tube. See Pneumatic dispatch, above.
POND n.
A body of water, naturally or artificially confined, and usually of less extent than a lake. "Through pond or pool." Milton. Pond hen (Zoöl.), the American coot. See Coot (a). -- Pond lily (Bot.), the water lily. See under Water, and Illust. under Nymphæa. -- Pond snail (Zoöl.), any gastropod living in fresh-water po…