Inter-House swimming opens tomorrow with two triangular meets, Adams vs. Dudley vs. Dunster and Leverett vs. Winthrop vs. Lowell, at the Indoor Athletic Building at 4:30 o'clock.

About 60 men are expected to turn out for the meets, Frank Vaughan, intramural swimming coach, announced yesterday. All men must report ready to swim promptly at 4:30 o'clock.

This is the first year that triangular meets have been held in the inter-House competition. There will be six meets during the year and on March 11 the winner in the competition will meet a team from Yale. Kirkland won the competition last year.

There will be eight events in the meets this year, including the 50-yard free style swim; 200-yard free style swim; required dives; 100-yard breast stroke swim; 100-yard back stroke swim; 100-yard free style swim; optional dives; and 200-yard relay race.