FLUORINE n.
A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepar…
HALLSTATT; HALLSTATTIAN a.
ic civilization of central Europe, variously dated at from 1000 to 1500 b. c. and usually associated with the Celtic or Alpine race. It was characterized by expert use of bronze, a knowledge of iron, possession of domestic animals, agriculture, and artistic skill and sentiment in manufacturing pottery, ornaments, etc.…