The clean and bright space is dominated by a large tank of deep green coloured potion. Inside the potion, pearly white forms float about in a deliberate manner as they are very much alive and very much brains - the Encephalons. Though they are mostly content to stay in their tanks and swim around, if removed or provoked they can attack so extra care must be given in their handling. They are here to aid in the research and study of the impact thought has throughout the magical world.

There are a few desks (all of which have enchanted to the floor for reasons, and upon one of them, beneath a glass bell jar stands a sparse and wiry device that strongly resembles Professor Edmond Savary d'Odiard's Thought Machine. On either side the walls bear doors which implies that there are additional spaces and rooms and that this department is indeed larger than previously thought to be.