y tables as will enable any one to find, by
mere inspection, which almanac he is to choose for any year, whether of old
or new style. [1866. I may now refer to my own _Book of Almanacs_, for the
same purpose].--A. De M.

Louis Benjamin Francoeur (1773-1849), after holding positions in the Ecole
polytechnique (1804) and the Lycee Charlemagne (1805), became professor of
higher algebra in the University of Paris (1809). His _Cours complet des
mathematiques pures_ was well received, and he also wrote on mechanics,
astronomy, and geodesy.

[760] Albertus Pighius, or Albert Pigghe, was born at Kempen c. 1490 and
died at Utrecht in 1542. He was a mathematician and a firm defender of the
faith, asserting the supremacy of the Pope and attacking both Luther and
Calvin. He spent some time in Rome. His greatest work was his _Hierarchiae
ecclesiasticae assertio_ (1538).

[761] This was A. F. Vogel. The work was his translation from the German
edition which appeared at Leipsic the same year, _Entdeckung einer
numerischen General-Aufloesung aller hoeheren endlichen Gleichungen von jeder
beliebigen algebraischen und transcendenten Form_.

[762] The latest edition of Burnside and Panton's _Theory of Equations_ has
this brief summary of the present status of the problem: "Demonstrations
have been given by Abel and Wantzel (see Serret's _Cours d'Algebre
Superieure_, Art. 516) of the impossibility of resolving algebraically
equations unrestricted in form, of a degree higher than the fourth. A
transcendental solution, however, of the quintic has been given by M.
Hermite, in a form involving elliptic integrals."

[763] There was a second edition of this work in 1846. The author's
_Astronomy Simplified_ was published in 1838, and the _Thoughts on Physical
Astronomy_ in 1840, with a second edition in 1842.

[764] This was _The Science of the Weather, by several authors... edited by
B._, Glasgow, 1867.

[765] This was Y. Ramachandra, son of Sundara L[=a]la. He was a teacher of
science in Delhi College, and the work to which De Morgan refers is _A
Treatise on problems of Maxima and Minima solved by Algebra_, which
appeared at Calcutta in 1850. De Morgan's edition was published at London
nine years later.

[766] Abraham de Moivre (1667-1754), French refugee in London, poor,
studying under difficulties, was a man with tastes in some respects like
those of De Morgan. For one thing, he was a lover of books, and he had a
good deal of interes