Former Ortho-Macneill president Percy Skuy has collected more than 700 odd contraceptives from history. His collection is now housed at the Dittrick Medical History Center museum in Cleveland. In an Associated Press article, Dittrick talks about a few of his faves. From the article:
Sponges and contraceptive foams were used in ancient Egypt, but as a contraceptive foam women were encouraged to use honey and crocodile dung as a spermicide. Aristotle suggesting layering the vagina with oil of cedar. Some sponges were soaked in lemon juice, something that actually worked because lemon is a mild spermicide.