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).
