Definition:Plato's Geometrical Number/Mistake

Source Work

 * The Dictionary
 * $216$
 * $216$

Mistake

 * The famous and notorious number of occurs in an obscure passage in, $\text{viii}$, $546$, $\text {B - D}$ ... Adams eventually reaches the conclusion that the number intended in the quoted passage is $216$ as the sum of the cubes of the sides of the triangle ... [Adams, The Republic of Plato, CUP, 1929]

Adams appears to be a mistake. An internet search reveals that there appears to be no such work.

It is probable that James Adam is the author referred to here. There does exist a $1929$ edition of the work of that name by that author.