A thermostat is a device for (a) switching off an electrical appliance (b) measuring temperature (c) regulating temperature (d) producing heat

A thermostat is a device for (a) switching off an electrical appliance (b) measuring temperature (c) regulating temperature (d) producing heat
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Description : I can't figure out how to wire the thermostat, transformer, fan/limit switch, and an electrical cut off (to pilot light) in my 1945 Armstrong Furnace. Help!

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