the interior originally contained 11 classrooms on the ground floor and 10 on the second floor, a library with a large fireplace, offices, and a two-story auditorium. large double staircases of slate and iron led to the upper floors. the third floor contained laboratories, shop classrooms, a gymnasium, a music room, and a teaching museum. much of the interior has been altered over the years due to changing needs and safety standards. a wing containing an updated gymnasium and chemistry classrooms was later added to the north.