My major essay on the history of the French Fry, called “French Fried: From Monticello to the Moon,” is full of the lore of the French Fry and its complex and fascinating historical and cultural background.  McDonald’s unique relationship to the French Fry is highlighted. You can find the essay at:

http://chilit.org/Papers%20by%20author/Ebeling%20–%20French%20Fried.htm