The Thermostat
I once took apart an old thermostat. It was a very simple device with mercury held in a glass tube. Mercury changes density very easily. That is why it is used for thermostats. I put the thermostat back together when I was done.
I put the thermostat back together when I was done. That is why it is used for thermostats. It was a very simple device with mercury held in a glass tube. I once took apart an old thermostat. Mercury changes density very easily.