[' ', ' ', ' ', 'layer', 'of', 'scale', 'on', 'the', 'inside', 'of', 'the', 'pipe', 'suggested', 'that', 'the', 'circulating', 'liquid', 'within', 'the', 'pipe,', 'when', 'adjusted', 'periodically', 'with', 'chemicals,', 'forms', 'an', 'acidic', 'medium', 'which', 'can', 'attack', 'the', 'pipe.', 'Care', 'and', 'accuracy', 'must', 'be', 'exercised', 'with', 'these', 'additives', 'to', 'avoid', 'deterioration', 'of', 'the', 'piping.', 'Cigarette', 'Ignition', 'Propensity', 'KIMBERLY-CLARK', 'SUGGESTS', 'THEIR', 'OXYGEN-DEPRIVATION', 'TEST', 'METHOD', 'MIGHT', 'BE', 'SUITABLE', 'AS', 'COMPARATIVE', 'MEASURE', 'OF', 'CIGARETTE', 'IGNITION', 'PROPENSITY', 'Kimberly-Clark', 'staff', 'have', 'suggested', 'that', 'an', 'oxygen-deprivation', 'test', 'method', 'used', 'in', 'their', 'laboratories', 'might', 'be', 'suitable', 'as', 'a', 'routine', 'comparative', 'measure', 'of', 'cigarette', 'ignition', 'propensity.', 'RJR', 'has', 'supplied', 'to', 'Kimberly-Clark', 'a', 'series', 'of', 'cigarettes', 'with', 'a', 'wide', 'range', 'of', 'ignition', 'propensities', 'as', 'measured', 'by', 'the', 'mock-up', 'test.', 'A', 'preliminary', 'analysis', 'of', 'Kimberly-Clark’s', 'oxygen-deprivation', 'test', 'data', 'for', 'these', 'cigarettes', 'shows', 'no', 'correlation', 'with', 'mock-up', 'test', 'results.', 'Further', 'data', 'analysis', 'is', 'in', 'progress.', 'Aerosol', 'Dynamics', 'LABORATORY', 'MEASUREMENTS', 'OF', 'EXHALED', 'PREMIER', 'MAINSTREAM', 'SMOKE', 'Controlled', 'laboratory', 'measurements', 'have', 'verified', 'the', 'subjective', 'observation', 'that', 'exhaled', 'mainstream', 'smoke', 'of', 'PREMIER', 'becomes', 'substantially', 'less', 'visible', 'on', 'dilution', 'into', 'the', 'environment', 'than', 'smoke', 'from', 'a', 'tobacco-burning', 'cigarette.', 'Further,', 'it', 'has', 'been', 'shown', 'that', 'the', 'greater', 'visual', 'reduction', 'for', 'PREMIER', 'smoke', 'is', 'associated', 'with', 'a', 'particle', 'mass', 'reduction.', 'A', 'theoretical', 'analysis', 'supports', 'the', 'experimental', 'observations', 'showing', 'that', 'particle', 'size', 'differences', 'and', 'the', 'degree', 'of', 'water', 'condensation/evaporation', 'determine', 'the', 'observed', 'effect.', '-~', '4', '-', '92LT', 'ELOTS']