Fannie Farmer, a mother's helper in the Shaw household, begins writing precise instructions for measuring and cooking, which eventually leads to the modern recipe and the publishing of a cookbook.

"When Fannie Farmer learned to cook in the late 1800s, recipes could be pretty silly. They might call for "a goodly amount of salt" or "a lump of butter" or "a suspicion of nutmeg." Girls were supposed to use their "feminine instincts" in the kitchen (or maybe just guess). Despite this problem, Fannie loved cooking, so when polio prevented her from going to college, she became a teacher at the Boston Cooking School. Unlike her mother or earlier cookbook...