An iron stair curls down into a stone laboratory where a tall machine fills the central vault. Violet light branches through its glass cylinders, held between heavy brass rings and a forest of slender rods. A thin spark reaches from a copper coil toward a polished metal sphere beside it. The surrounding walls carry pipes, valves and pale circular dials, each catching a little of the light from the nearby lamps.

Glass flasks crowd an oak workbench on the right. Their narrow necks and rounded bodies reflect small warm highlights, while dark wooden stools wait beneath the table. The floor is built from broad uneven slabs, worn along the path between the stair and the machine. Above everything, rough stone arches repeat into the background and leave deep pockets of shadow around the equipment. The low position makes the apparatus feel large without losing the room that holds it. Cool violet light touches the central glass and nearby floor, while the caged lamps reveal copper windings, dusty stone and dark iron.