The Pulitizer prize winning Harvard composer Leon Kirchner will spend part of the upcoming academic year at the prestigious Julliard School of Music.

Kirchner who is Rosen Professor of Music, said yesterday that he will travel to Julliard once every other week to teach a mastery class of performers. The job will be solely on a part-time basis, a temporary post to help fill in for one of Julliard's foremost teachers, Roger Sessions, who is in ill health he said.

Kirchner, 64 noted that the former president of Julliard Peter Mennin, who died last month, had invited him to the coservatory for a permanent position after he retires from Harvard. But he added that he has made no such plans for the moment.

It is just for the year and an emergency thing," said Harvard's Music Department Chairman. Christoph Wolf. It will not affect this teaching here.