The brain within its groove The brain within its groove Runs evenly and true; But let a splinter swerve, T'were easier for you To put the water back When floods have slit the hills, And scooped a turnpike for themselves, And blotted out the mills! Emily Dickinson, The Collected Poems of Emily Dickinson insanitymind
Caustic (optics) Caustics made by the surface of water. In optics, a caustic is the envelope of light rays reflected or refracted by a curved surface or object, or the projection of that envelope of rays on another surface. The caustic is a curve or surface to which each of the light rays is tangent, defining a boundary of an envelope of rays as a curve of concentrated light. Wikipedia en.wikipedia.org Architectural CausticsCaustic Engineering caustics