PETROLEUM n.
tillation of crude petroleum at a temperature of 170° Fahr., or below. The term is rather loosely applied to a considerable range of products, including benzine and ligroin. The terms petroleum ether, and naphtha, are sometimes applied to the still more volatile products, including rhigolene, gasoline, cymogene, etc.…
PLASTER n.
ter a paste which soon sets or hardens, and is used for casts, moldings, etc. The term is loosely applied to any plaster stone or species of gypsum. -- Plaster of Paris bandage (Surg.), a bandage saturated with a paste of plaster of Paris, which on drying forms a perfectly fitting splint. -- Plaster stone, any specie…
PORPHYRY n.
A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles. Porphyry shell (Zoöl.), a handsome marine gastropod shell (Oliva…
SACK n.
Originally, a loosely hanging garnment for women, worn like a cloak about the shoulders, and serving as a decorative appendage to the gown; now, an outer garment with sleeves, worn by women; as, a dressing saek. [Written also sacque.]