What made the difference eventually was the development of good bricks, which can deal with heat better over the long term than almost any rock can. Chimneys also permitted a change in fuel to coal—which was timely because Britain’s wood supplies were rapidly dwindling. Because coal smoke was acrid and poisonous, it needed to be contained within a fireplace—or chimneypiece, as they were first known (to distinguish them from open hearths, also known as fireplaces)—where fumes and smoke could be directed up a flue. This made for a cleaner house but a filthier world outside, and that, as we shall
...more
