when i first came here , as an undergrad , the building was decrepitclassrooms not updated since the forties , walls not painted since the seventies , original 1912 windows which rattled incessantly in heavy winds , hallways underlit with a working bulb in only every third fixture , uncooled in summer and underheated in winter , floors filled with cracks which were crammed with decades of dirt and impervious to the most aggressive sweeping .