Numerous antique recipes provide oven baking temperatures using the adjectives slow, medium, or hot. The 1961 edition of The Fannie Farmer Cookbook provides corresponding temperature equivalents as 300 degrees, 350 degrees, and 400 degrees Fahrenheit. Slight variations of 25-50 degrees Fahrenheit, are used to classify temperatures as very slow, moderately slow, moderately hot, and very hot ovens.