h and History at King's College, London,
from 1840 to 1853. He was one of the founders of Queen's College for women,
and was the first principal of the Working Men's College, London. The
subject referred to by De Morgan is his expression of opinion in his
_Theological Essays_ (1853) that future punishment is not eternal. As a
result of this expression he lost his professorship at King's College. In
1866 he was made Knightbridge Professor of Casuistry, Moral Theology, and
Moral Philosophy at Cambridge.

[200] See Vol. I, page 46, note 1 {42}. Besides the books mentioned in
this list he wrote _The Ratio between Diameter and Circumference
demonstrated by angles, and Euclid's Theorem, Proposition 32, Book I,
proved to be fallacious_ (Liverpool, 1870). This is the theorem which
asserts that the exterior angle of a triangle is equal to the sum of the
two opposite interior angles, and that the sum of the interior angles
equals two right angles. He also published his _Curiosities of Mathematics_
in 1870, a work containing an extensive correspondence with every one who
would pay any attention to him. De Morgan was then too feeble to show any
interest in the final effort of the subject of some of his keenest satire.

[201] See Vol. I, page 332, note 4 {709}.

[202] See Vol. I, page 101, note 4 {174}.

[203] "The circle-squaring disease"; literally, "the circle-measuring
disease."

[204] See Vol. II, page 63, note 136.

[205] William Rutherford (c. 1798-1871), teacher of mathematics at
Woolwich, secretary of the Royal Astronomical Society, editor of _The
Mathematician_, and author of various textbooks. _The Extension of [pi] to
440 places_, appeared in the _Proceedings_ of the Royal Society in 1853 (p.
274).

[206] Charles Knight (1791-1873) was associated with De Morgan for many
years. After 1828 he superintended the publications of the Society for the
Diffusion of Useful Knowledge, to which De Morgan contributed, and he
edited the _Penny Cyclopedia_ (1833-1844) for which De Morgan wrote the
articles on mathematics.

[207] Sir William Hamilton. See Vol. I, page 112, note 7 {211}.

[208] Adam Smith (1723-1790) was not only known for his _Wealth of Nations_
(1776), but for his _Theory of Moral Sentiments_ (1759), published while he
was professor of moral philosophy at Glasgow (1752-1764). He was Lord
Rector of the university in 1787.

[209] See Vol. I, page 332, note 4 {709}.

[210] "Whip."

[211] "Terrible lash."