I spent two weeks last winter in a workshop outside Bath, surrounded by brass tubes, slivers of hand-cut glass, and the faint smell of shellac. The craftsman beside me held a cylinder to the window light and turned it slowly. Inside, a universe rearranged itself: twenty thousand reflections, each one symmetric, each one unrepeatable.
The Geometry of Perception
Sir David Brewster patented the kaleidoscope in 1816, though he had been tinkering with reflected symmetry since 1807. He intended it as a scientific instrument, a tool for studying light and crystallographic form. The public had other ideas: within a year, the optical toy had become a parlour obsession.
Its spell lived in the chamber: a small cell where glass, beads, and petals tumbled freely. Every rotation produced a new mandala, describable but never exactly reproducible.