entioned
below, his _De cometis anni 1618_ appeared at Leipsic in 1656. He also
wrote a _Disputatio an coelum moveatur et terra quiescat_, which appeared
at Antwerp in 1619, and again at Leipsic in 1656.

[107] Libertus Fromondus (1587-c 1653), a Belgian theologian, dean of the
College Church at Harcourt, and professor at Louvain. The name also appears
as Froidmont and Froimont.

[108] _L. Fromondi ... meteorologicorum libri sex.... Cui accessit T. Fieni
et L. Fromondi dissertationes de cometa anni 1618...._ This is from the
1670 edition. The 1619 edition was published at Antwerp. The
_Meteorologicorum libri VI_, appeared at Antwerp in 1627. He also wrote
_Anti-Aristarchus sive orbis terrae immobilis liber unicus_ (Antwerp,
1631); _Labyrrinthus sive de compositione continui liber unus, Philosophis,
Mathematicis, Theologis utilis et jucundus_ (Antwerp, 1631) and _Vesta sive
Anti-Aristarchi vindex adversus Jac. Lansbergium (Philippi filium) et
copernicanos_ (Antwerp, 1634).

[109] Snell was born at Leyden in 1591, and died there in 1626. He studied
under Tycho Brahe and Kepler, and is known for Snell's law of the
refraction of light. He was the first to determine the size of the earth by
measuring the arc of a meridian with any fair degree of accuracy. The title
should read: _Willebrordi Snellii R. F. Cyclometricus, de circuli
dimensione secundum Logistarum abacos, et ad Mechanicem accuratissima...._

[110] Bacon was born at York House, London, in 1561, and died near
Highgate, London, in 1626. His _Novum Organum Scientiarum or New Method of
employing the reasoning faculties in the pursuits of Truth_ appeared at
London in 1620. He had previously published a work entitled _Of the
Proficience and Advancement of Learning, divine and humane_ (London, 1605),
which again appeared in 1621. His _De augmentis scientiarum Libri IX_
appeared at Paris in 1624, and his _Historia naturalis et experimentalis de
ventis_ at Leyden in 1638. He was successively solicitor general, attorney
general, lord chancellor (1619), Baron Verulam and Viscount St. Albans. He
was deprived of office and was imprisoned in the Tower of London in 1621,
but was later pardoned.

[111] The Greek form, _Organon_, is sometimes used.

[112] James Spedding (1808-1881), fellow of Cambridge, who devoted his life
to his edition of Bacon.

[113] R. Leslie Ellis (1817-1859), editor of the _Cambridge Mathematical
Journal_. He also wrote on Roman aqueducts, on Boole