International Paper, which recently acquired Hammermill Paper for $1.08 billion, said its third-quarter net income soared from the same period last year, when it had a $23-million charge against earnings. "Our results reflect the impact of our cost reduction programs, improved manufacturing operations and firmer markets in most of our pulp, paper and paperboard product lines." said John. A. Georges, International's chairman and chief executive. Among other paper and wood products makers, Georgia-Pacific said third-quarter profit was up by about 67% from last year.