Base: fan, relay, vanes to control air flow, thermostat sticking up at rear. A 25 watt candleabra lamp, shown just above the white plastic fan, is controlled by the thermostat to produce heat. A gasket made from the top of the sweater box which provides the cover for the incubator, is tacked and glued to the periphery of the top of the base. Created on February 16, 2002