Essays: Scientific, Political, & Speculative; Vol. 1 of 3 / Library Edition (1891), Containing Seven Essays not before Republished, and Various other Additions.

HERBERT SPENCER.
LIBRARY EDITION,
(OTHERWISE FIFTH THOUSAND) Containing Seven Essays not before Republished, and various other additions.
VOL. I.
WILLIAMS AND NORGATE,
14, HENRIETTA STREET, COVENT GARDEN, LONDON: AND 20. SOUTH FREDERICK STREET. EDINBURGH. 1891.
LONDON: G. NORMAN AND SON, PRINTERS, HART STREET, COVENT GARDEN.

Excepting those which have appeared as articles in periodicals during the last eight years, the essays here gathered together were originally re-published in separate volumes at long intervals. The first volume appeared in December 1857; the second in November 1863; and the third in February 1874. By the time the original editions of the first two had been sold, American reprints, differently entitled and having the essays differently arranged, had been produced; and, for economy's sake, I have since contented myself with importing successive supplies printed from the American stereotype plates. Of the third volume, however, supplies have, as they were required, been printed over here, from plates partly American and partly English. The completion of this final edition of course puts an end to this make-shift arrangement.
The essays above referred to as having been written since 1882, are now incorporated with those previously re-published. There are seven of them; namely— Morals and Moral Sentiments, The Factors of Organic Evolution, Professor Green's Explanations, The Ethics of Kant, Absolute Political Ethics, From Freedom to Bondage, and The Americans. As well as these large additions there are small additions, in the shape of post scripts to various essays—one to The Constitution of the Sun, one to The Philosophy of Style, one to Railway Morals, one to Prison Ethics, and one to The Origin and Function of Music: which last is about equal in length to the original essay. Changes have been made in many of the essays: in some cases by omitting passages and in other cases by including new ones. Especially the essay on The Nebular Hypothesis may be named as one which, though unchanged in essentials, has been much altered by additions and subtractions, and by bringing its statements up to date; so that it has been in large measure re-cast. Beyond these respects in which this final edition differs from preceding editions, it differs in having undergone a verification of its references and quotations, as well as a second verbal revision.