note 147.

[316] "The wills are free, and I wish neither the one nor the other."

[317] "The force of inertia conquered."

[318] Reddie also wrote _The Mechanics of the Heavens_, referred to later
in this work. He must not be confused with Judge James Reddie (1773-1852),
of Glasgow, who wrote on international law, although this is done in the
printed edition of the British Museum catalogue, for he is mentioned by De
Morgan somewhat later as alive in 1862.

[319] Henry Dunning Macleod (1821-1902), a lawyer and writer on political
economy, was a Scotchman by birth. He wrote on economical questions, and
lectured on banking at Cambridge (1877) and at King's College, London
(1878). He was a free lance in his field, and was not considered orthodox
by the majority of economists of his time. He was an unsuccessful candidate
for the chairs of political economy at Cambridge (1863), Edinburgh (1871),
and Oxford (1888).

[320] See Vol. I, page 252, note 2 {576}.

[321] Francis Henry Laing (1816-1889) was a graduate of Queen's College,
Cambridge, and a clergyman in the Church of England until 1846, when he
entered the Church of Rome. He taught in various Jesuit colleges until
1862, when his eccentricity was too marked to warrant the Church in
allowing him to continue. He published various controversial writings
during his later years. Of course if he had known the works of Wessel,
Gaus, Buee, Argand, and others, he would not have made such a sorry
exhibition of his ignorance of mathematics.

[322] See Vol. I, page 329, note 1 {705}. The book went into a second
edition in 1864.

[323] Thomas Weddle (1817-1853) was, at the time of publishing this paper,
a teacher in a private school. In 1851 he became professor of mathematics
at Sandhurst. He contributed several papers to the _Cambridge and Dublin
Mathematical Journal_, chiefly on geometry.

[324] See Vol. II, page 109, note 205.

[325] See Vol. II, page 66, note 143.

[326] See Vol. II, page 151, note 268.

[327] George Barrett (1752-1821) worked from 1786 to 1811 on a set of life
insurance and annuity tables. He invented a plan known as the "columnar
method" for the construction of such tables, and as De Morgan states, this
was published by Francis Baily, appearing in the appendix to his work on
annuities, in the edition of 1813. Some of his tables were used in
Babbage's _Comparative View of the various Institutions for the Assurance
of Lives_ (1826).

[328] See Vol.