Morton Thiokol Inc.’s second-quarter net income dipped...

Morton Thiokol Inc.’s second-quarter net income dipped about 1% from a year ago to $39 million. Sales advanced to $632 million, up 8%. Morton Thiokol is a Chicago-based manufacturer of specialty chemicals, high-technology propulsion systems, air bags and salt. The firm attributed the results to an accounting change that decreased earnings by $14.1 million, raw material price increases in some highly competitive product lines and higher production costs on the Trident II and MX missile projects.