ILLUSTRATIONS OF UNIVERSAL PROGRESS," "FIRST PRINCIPLES OF PHILOSOPHY
"EDUCATION," "SOCIAL STATICS," "ELEMENTS OF BIOLOGY," i ELEMENTS

D. APPLETON AND COMPANY,
1, 3, AND 5 BOND STREET.

1881.

Entered, according to Act of Congress, in the y car 1864,

BY D. APPLETON & CO.,

In the Clerk's Office of the District Court of the United States for the Southern District of New York,

824 Sp 3e 1881

EDITOR'S PREFACE.

THE miscellaneous writings of Herbert Spencer, originally published in various English periodicals, were collected by the Author and reissued in London in two volumes, under the title of "Essays Scientific, Political, and Speculative," first and second series-the former appearing in 1857, and the latter in 1863. Neither of these volumes has been printed in this country, though a small edition of the second series was imported in sheets, bound and sold in a few weeks. The increasing demand for these works on this side of the Atlantic, and the impracticability of obtaining them from England, owing to the high rate of exchange, made it desirable to republish them here. Accordingly, a portion of the Essays, selected from both series, were recently reissued under the title of " Illustrations of Universal Progress.' This collection embraced the more strictly scientific articles, and those which bore most directly upon the gen

712421