Students, holed up in Widener Library in preparation for midterms, were forced from their study carrels just past 6:00 p.m. Monday night following what one firefighter described as a system malfunction.

"We're going to want to talk with Harvard Fire Protection Services about what can be done to rectify this mechanical problem," said the Cambridge fireman.

Monday's evacuation came just days after a sprinkler malfunction damaged approximately 400 books in the library.