How Planes, their substance with their motion grown,
Form the huge Cube, the Cylinder, the Cone.
Lo! where the chimney's sooty tube ascends,
The fair Trochais[68] from the corner bends!
Her coal-black eyes upturn'd, incessant mark
The eddying smoke, quick flame, and volant spark;
Mark with quick ken, where flashing in between
Her much-loved Smoke-Jack glimmers thro' the scene:
Mark how his various parts together tend,
Point to one purpose,—in one object end: