I'm somwehat familiar with that book. Here's one for chits and giggles when it comes to 'running too hot.'
Go to page 6A-3. (Nice job Vicki; it's the cat'sass! And it will cut down on the wear-tear factor of my hard copy) Scroll down to temperature specifications for the thermostat and note the high accetable temperature, meaning the temperature is vots.
Those proofreaders were not technical people, were they (range of temps for a used thermostat)? Or maybe they just were very poor math students. Either way a normal hot operating temp of 222 is a respectable number, and the whole reason cooling systems are pressurized.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching