NL INDUSTRIES INC <NL> 3RD QTR NET Shr profit two cts vs loss 58 cts Net profit 18.2 mln vs loss 23.9 mln Revs 355.6 mln vs 308.2 mln Nine mths Shr loss 81 cts vs loss 5.52 dlrs Net profit 10.7 mln vs loss 290.3 mln Revs 1.01 billion vs 983.3 mln NOTE: Net income per share is after deductions for mandatory preferred stock dividends and income from the chemical operations not attributable to common stockholders. 1987 qtr and nine mths includes gain of eight cts per share for the partial redemption of series a preferred stock which will be paid from the net earnings of the chemicals operations. 1986 nine mths includes loss 247.7 mln dlrs from write-down of petroleum service assets and other restructuring costs.