lemniscata

“For Dr. Bledsoe was an enthusiastic advocate of Secession, to such an extent that he would not infrequently interlard his demonstration of some difficult problem in differential or integral calculus -- for example, the lemniscata of Bernouilli -- with some vigorous remarks in the doctrine of States 'rights.”

A soldier's recollections : leaves from the diary of a young Confederate : with an oration on the motives and aims of the soldiers of the South,

“Herschel, forms a _lemniscata_; but the experimental proof was here, as in numberless other cases, preceded by the deduction which showed that, according to the undulatory theory, the bands must possess this special character.”

Six Lectures on Light Delivered In The United States In 1872-1873