030774 The Rev. Jesse L. Jackson plays stickball

 NEW HAVEN, March 6 The Rev. Jesse L. Jackson grasped a bat and glared at, the pitcher.

"Did Sam Ervin do this when he was here as a Chubb Fellows'' Mr. Jackson asked.

The participation of the 32vear-old black civil-rights leader ~r in a student stickball game was just one of his untraditional activities during a three day visit to Yale University, which ended this afternoon.

His stay was supported by the Chubb Fellowship, established in 1895 to bring leaders in public life to the Yale campus. However, Mr. Jackson took care to devote a good part of his time to contacts with the New Haven community.

"We bring In so many politicians who don't have a local interest here," said Dom Campisi, the Yale law student who is in charge of Mr. Jackson's program here. "He's interested in what happens in New Haven - which is different."

Mr. Jackson, who was in New York on Sunday and flew to Amherst, Mass., for a speech tonight, began his trip 'here with a sermon to 1,200 remembers of a local Baptist: church. His last scheduled activity was a meeting with local black political and civic leaders.

in between -besides getting together with local high !school students and factory workers - he also managed numerous meetings with campus groups, both formal and informal. I "There's a lot of value in  'this kind of a mission for the teacher and the taught," Mr.Jackson commented to a reporter. "The real heart of America is rights here developing minds, young black people
some white people whose attitudinal adjustment is taking place.

"To that extent, we have as much obligation to focus on the campus as it proceeds without confrontation as we do to focus on it when it's in a state of siege. Being here has been one of the best experiences of my life."

Mr. Jackson said be had found "a new seriousness among black students I've talked to here," and he encouraged them to apply their skills to their own communities. "It's a good thing to be ethnic," he said repeatedly,, "but beyond that, we must be ethical, and we must be excellent."

"You can be a midget with the mind of a giant," he told the final student group of his stay, "and conquer a giant with the mind of a midget."

On Tuesday night, Mr. Jackson gave a vigorous speech to a packed audience or 450, while 100 other people listened in a separate room. About half the audience were not Yale students, which is a high proportion for a speech by a Chubb Fellow.

"To the extent that we feel secure enough to project our strength into the broader community," Mr. Jackson told his audience, "the whole nation will get healthier just a -little quicker."