The London Geological Society . . . [has] an admirable collection, but most unfortunately situated as to light. I found this to be the case with a large part of the public cabinets which I saw . . . . As we were at that time about erecting cabinets in Amherst, my attention was called particularly to this point. And I came to this conclusion, that where the light was introduced through sky-lights in the centre of the room the specimens showed well; still better, perhaps, if brought in through windows in the walls immediately below that ceiling, and best of all, where there are such lights and sky-lights besides. . . .