Re: Household Algebra

In article <v10ou0$kmp$1@panix2.panix.com>, kludge@panix.com (Scott
Dorsey) wrote:

Just what IS gas mark five anyway?

Serious answer: 191 C (375 F)

https://en.wikipedia.org/wiki/Gas_mark

Interestingly, that article refers to gas regulo, which was the term I
remember growing up.  I didn't know it came from an early type of
regulated oven.

I remember school science text books back in the sixties having diagrams
of gas oven thermostats.  I can't find it online but as I recall, it had
a metal rod that expanded as the temperature increased, shutting off the
gas flow.  (I haven't had a gas oven for years.)