She grew up cooking with a wood cookstove, so no temperature controls there; she was born in 1901. Some say "medium oven", that means about 350 in her book, as we had that conversation a few times when I was a kid helping, & "hot" was later interpreted as 400.
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I also grew up with a wood stove, and in baking biscuits, you stuck your arm into the oven and started counting. If you could get to 30, it was not hot enough, probably Medium, or about 300 or so. But if all you could stand was up to 20, then slam in the baking sheet or pan and close the oven door. Let them cook while the bacon sizzled and popped on top of the stove.
As for recipes, I have one from my Mom's Aunt Benton Field. A recipe for her famous Blackberry cake which called for cocoa and "green cracked tea cup full of sugar" which I think must be a half cup or so. Loved visiting her as a child, and the strongest memory I have of her is that she always smelled of vanilla.