Fig. 69 shows a thermostatic control valve attached to the bottom of a heater coil, and at the side of storage tank.
The automatic iron has what is called a thermostatic control which holds the temperature of the iron at the heat you want.
It probably wouldn't be noticed that the torn and blood-spattered clothes on the corpse were not thermostatic.
This is accomplished by means of a thermostatic bar made of plates of brass and vulcanite fastened together.
A device that monitors and automatically responds to changes in temperature and activates switches controlling devices such as furnaces or air conditioners.