Aluminum Arm

1920's Thermodynamics Apparatus
This is a specialized form of Junkers Calorimeter used to measure the energy obtained by burning gas.
The small engraving on photo 5 is from the American Meter Company, 1917 instruction manual....
It shows the operation of the calorimeter.The rate at which the gas is burned inside the
calorimeter is measured by the wet test meter. Water flows into the jacket around the combustion
chamber at a steady rate, controlled by the constant head device at the top. The mass of the water
passing through the apparatus as a function of time is determined with the bucket and scale on the right.
The temperature of the incoming water and that of the overflow water is measured
by the two thermometers. In short it tells you how efficiently a particular gas will burn.