A thermostat regulates the heat.
"If You're Going to Live in the Country"
Thomas H. Ormsbee and Richmond Huntley
This, as its name implies, is a forced draft controlled by a thermostat, and with it the cheaper grades of coal can be used.
"If You're Going to Live in the Country"
Thomas H. Ormsbee and Richmond Huntley
With a thermostat that turns current on and off, it and the ironing board can remain forgotten for hours.
"If You're Going to Live in the Country"
Thomas H. Ormsbee and Richmond Huntley