Consisting of cylindrical copper rod with its one end surrounded by a steam jacket for heating it from a boiler and the other end is kept cool by a steam of water flowing through a spiral tube provided at that end.
Fitted in wooden case lined with felt. The front portion of the case is removable. Without thermometers or steam boiler.
(a)Size of rod 30cm long 1.8cm dia.
(b)Size of rod 30cm long 2.5cm dia.
(c)Size of rod 30cm long 3.7cm dia.