percylite

[After the metallurgist Dr. John Percy, who analyzed it, and Gr. lithos a stone.] Min.: An isometric mineral, occurring in small cubes, and ma ive. Hardne , 2'5; color and streak, sky-blue. Composition: An oxy chloride of lead and copper, with some water, the suggested formula being (PbCl+PbO)+(CuCl+CuO)+aq. Until recently, represented by one specimen of unknown locality in the British Museum collection; no at the copper-mines of Nam aqua land, South Africa. †per-diç'-i-dae, s . pl . [Latin perdix , gen it. per dic ( is ); fem. pl. adj. suff. -idœ .] Ornith.: A family of Rasores (q. v.), embracing the Partridges and Quails, now replaced by the Perdicine (q. v.).