A train of kettles from an 1857 drawing by Henry Olcott. Of the five iron kettles, the largest was La Grande (shown in this drawing as a vat) and the smallest was La Batterie. The fire was under La Batterie; the heat from the fire was drawn under the other kettles and then up the flue chimney. The kettles were completely enclosed by a brick foundation and plastered to contain the heat. |