oravitzite

[From Orawitz(a), Hungary, where found; suff. -ite ( Min. ).] Min.: An amorphous mineral occurring in nodules. Hardne , 2-2.5; specific gravity, 2-701; luster, wax-like, unctuous. Composition: A hydrated silicate of alumina, with some zinc. Found with calamine (q. v.). sin, aş; expect, Xenophon, exist. ph = f. IMG:content-0341.png:[blocks in formation] IMG:content-0342.png:[blocks in formation] orbicular-leaf, s. orbit-sweeper, s. orcein Astron.: An instrument invented by Airy. to follow the inclined path of a comet or planet. It resembles a German equatorial, the polar axis of which is of greater length than usual, and which works for some distance at its upper end in a tubular Bot.: A leaf perfectly circular, as the leaf of bearing. Cotyledon orbiculare .