[Figs. 892], [893], [894], [895], [896.], represent the kiln for baking the biscuit, and also for running the glaze, in the English potteries.
a, a, [figs. 892], [893], and [894], are the furnaces which heat the kiln; of which b, in [fig. 892.], are the upper mouths, and b′ the lower; the former being closed more or less by the fire-tile z, shown in [fig. 896.]
f is one fireplace; for the manner of distributing the fuel in it, see [fig. 896.]
g, y, [figs. 892.] and [896.], are the horizontal and vertical flues and chimneys for conducting the flame and smoke. l is the laboratory, or body of the kiln; having its floor k sloping slightly downwards from the centre to the circumference. x, y, is the slit of the horizontal register, leading to the chimney flue y of the furnace, being the first regulator; x, u, is the vertical register conduit, leading to the furnace or mouth f, being the second regulator; v is the register slit above the furnace, and its vertical flue leading into the body of the kiln; v′, c, slit for regulating flue at the shoulder of the kiln; i is an arch which supports the walls of the kiln, when the furnace is under repair; c, c, are small flues in the vault s of the laboratory. h, [fig. 893.], is the central flue, called lunette, of the laboratory.
T, T, is the conical tower or howell, strengthened with a series of iron hoops, O′ is the great chimney or lunette of the tower; p is the door of the laboratory, bound inside with an iron frame.
A, is the complete kiln and howell, with all its appurtenances.
B, [fig. 893.], is the plan at the level d, d, of the floor, to show the arrangement and distribution of all the horizontal flues, both circular and radiating.
C, [fig. 894.], is a plan at the level e, e, of the upper mouths b, of the furnaces, to show the disposition of the fireplaces of the vertical flues, and of the horizontal registers, or peep-holes.