Plücker's quartic is a name that may given to the quartic curve
(correcting the typo of for ) with small and positive constructed by Plücker (Plücker 1839, Gray 1982) as the first known example of a quartic curve with 28 real bitangents. Without mentioning its origin or significance, this curve with is termed the ampersand curve by Cundy and Rowlett (1989, p. 72).