1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) (judaism) sacred chest where the ancient hebrews kept the two tablets containing the ten commandments 2) gear (including necessary machinery) for a particular enterprise 3) nut of any of several trees of the genus corylus DOWN 1) electrical conduction through a gas in an applied electric field 2) the former capital and 2nd largest city of brazil; chief brazilian port; famous as a tourist attraction 3) formerly the predominant security police organization of soviet russia ** Scroll down for solution. ** Are you sure you want to peek? ark rig cob