The space between the two cylinders serves as a heater and distributor for the blast, which is introduced through the nozzle at the bottom, and enters the furnace through a series of several small tuyeres arranged round the inner lining.
H is an electric heater for raising the body to a suitable temperature, which can swing into place directly over the calorimeter.
The steam pressure in the heater may be periodically varied by the gauge in such a manner as to produce an approximately simple harmonic oscillation of temperature at the hot end, while the cool end is kept at a steady temperature.
Cynthia sat huddled in the corner of her seat, away from Dean, her tiny size looking childlike as she trembled, in spite of the fact the Jeep's heater was set on high.
Between the heater and the calorimeter.