On 12/26/2015 4:14 PM, Kirk Landaur wrote:
On Sat, 26 Dec 2015 12:49:29 -0800, Uncle Monster wrote:

Inside you'll see a sliding resistor called an "Anticipator"
which provides a tiny amount of heat to fool the thermostat.
ヽ(€¢€¿€¢)ノ

Is this the anticipator?
http://i63.tinypic.com/280nvqs.jpg

Yes

...
On the one hand, the LONGER on one end *implies* that's the end
where the slider makes the hysteresis longer; but, on the other
hand, the arrow points in the opposite direction, which implies
the hysteresis is longer in the other direction?
...

The anticipator has nothing to do with hysteresis. It's adjustable to
account for different currents that are drawn by different "heaters".
Once adjusted to the current that your heater draws, it will put heat
into the thermostat to anticipate the room heating up.