WUDKS UF GunDunG SPENCER, 
PUBLISHED BY 
D. APPLETON AND COMPANY. 
SYSTEM OF PHILOSOPHY 
I.—FIRST PRINCIPLES. 
(New and Enlarged Edition.) 
Parr J.—Tue Unxnowante. 
Par II.—Laws or tar Knowasiz. 
559 pages. Price, - - - - 2 . $2.50 
II.—THE PRINCIPLES OF BIOLOGY.—VOL. L 
Part J.—Tuez Data or Broxoey. 
Parr J.—Tux Innvuctions or Brotogy. 
Part JIl.—Tae Evorurion or Lire. 
475 pages. Price, - = = ee eee 82,50 
PRINCIPLES OF BIOLOGY.—VOL, II. 
Part ITV.—MorpHonocican DEVELOPMENT. 
Part V.—PuysroLogicat DEVELOPMENT, 
Part VI.—Laws or MuttipricaTron. 
565 pages. Price, - eee $250 
II.—THE PRINCIPLES OF PSYCHOLOGY. 
Part I,—Tue Dara or Psycuonocy. 144 pages. Price, - - $0.75 
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Part JII.—GeEnerat Syntuesis. 100 pages. 3 
Parr IV.—Srecran Synruxsis. 112 pages. | Price, - = §$1,00 
MISCELLANEOUS. 
I—ILLUSTRATIONS OF UNIVERSAL PROGRESS. 
TaiRTeEN ArticiEs. 451 pages. Price, - - - $2.50 
IL—ESSAYS: 
Monat, PoxrticaL, anp AisTHeTIC. 
Ten Essays. 886 pages. Price, - 5 © 2 = «+ $2.50 
III.--SOCIAL STATICS: 
Ox tHe Conprrions EssentraL To Human Happiness SPaCIFIED, AND THE 
First or tHem DEVELOPED. ; 
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IV.—EDUCATION : 7 
InTELLECTUAL, Moral, AND PHysicaL. 
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V.—CLASSIFICATION OF THE SCIENCES. 
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VI.—SPONTANEOUS GENERATION, &c. 
{6 pages, Price, . . F A ‘ $0.28 
