Harvard's unbeaten varsity hockey squad built an early four-goal advantage and then coasted to a 5-0 win over a hard-hitting Brown University unit Saturday night at Watson Rink.

The victory moved the Crimson season record to 3-0-1 and gave hockey coach Cooney Weiland his 300th career win-an accomplishment matched by only four other hockey coaches in the country.

The triumph was far from easy, however, as the Bruin skaters lived up to their reputation as a physically demanding team. A total of 26 penalties was called-16 on Brown-and the second period was marred by a wild free-for-all.

Joe Cavanagh, Harvard's captain and leading scorer, was knocked out of the game late in the first period, after being hit in the mouth with a Brown skate. "Two or three guys hit me at once," Cavanagh said. "I saw them coming, but I fell down. I don't think they did it on purpose."

Two Teeth

Cavanagh, who has been in the infirmary all weekend, says he doesn't know if he'll be able to play Tuesday against B. C., but that he should be ready for next week's ECAC Hockey Tourney at Madison Square Garden. He needed 14 stitches on his lower lip, and lost two teeth.

Harvard goalie Bruce Durno was superb on defense, and the entire squad played a sharp contest, shutting out a strong Bruin team. Durno made 21 saves before being replaced with four minutes left in the game.

Andy Burnes slapped in the first tally of the evening with just over three minutes gone. Dave Hynes scored the first of his two goals of the game with 7:52 gone on a solo shot from the center as the Crimson took a 2-0 lead.

Center Bob McManama pushed in Cooch Owen's rebounded shot on goal midway through the opening period. McManama. Bob Muse, and Hynes combined for the fourth Crimson point with more than five minutes remaining in the period.

The second period was long and slow, but it was a crowd-pleaser. Eleven penalties were called, and at times there were only seven skaters on the ice. The only goal in the period came with 27 seconds left. Cooch Owen fed center Jay Riley on a power play, and Riley crammed in the shot from the right side.

Cavanagh later commented that the thing that bothered him the most was getting decked so early in the game, with only one goal to his credit. "Right now. I've got four teeth out on top, two on the bottom, and one in back. I mean, hockey's a great game."