This volume is in no sense an intimate or authorised biography of
Huxley. It is simply an outline of the external features of his life
and an account of his contributions to biology, to educational and
social problems, and to philosophy and metaphysics. In preparing it, I
have been indebted to his own Autobiography, to the obituary notice
written by Sir Michael Foster for the Royal Society of London, to a
sketch of him by Professor Howes, his successor at the Royal College
of Science, and to his published works. The latter consist of many
well-known separate volumes which are familiar to all zoölogists, and
of a vast number of memoirs and essays scattered in various scientific
and general publications. The general Essays were collected into nine
volumes, revised by himself in the later years of his life, and
published by Messrs. Macmillan. The Scientific Memoirs, thanks to the
generous enterprise of the same publishing firm, with which he was so
long associated, and to the pious labours of Sir Michael Foster and
Professor Ray Lankester, are in process of reissue in the form of four
volumes, two of which have now appeared. These will contain all his
important contributions to science, with the exception of a large
separate treatise on the _Oceanic Hydrozoa_ published by the Ray
Society in 1859. There is also announced a formal Biography, prepared
by his son, so that future admirers or students of Huxley's work will
be in an exceptionally favourable position.

LONDON, 1900.

P. CHALMERS MITCHELL.