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ANNUAL OF SCIENTIFIC DISCOVERY FOR 187O ; or, Year 

 Book of Facts in Science and Art, exhibiting the most important Discoveries 

 and Improvements in Mechanics, Useful Arts, Natural Philosophy, Chemistry, 

 Astronomy, Meteorology, Zoology, Botany, Mineralogy, Geology, Geography, 

 Antiquities, &c., together with a list of recent Scientific Publications ; a classi- 

 fied list of Patents ; Obituaries of eminent Scientific Men ; an Index of Impor- 

 tant Papers in Scientific Journals, Reports, &c. 

 With a Portrait 12mo. 2.00. 



VOLUMES OF THE SAME WORK for years 1850 to 1870 (twenty vols.), with the 

 Likeness of some distinguished Scientific or Literary man in each. 2.00 per 

 volume. 



The whole Series bound in uniform style, and put up in an elegant, substantial 

 box, 40.00. 



This work, issued annually, contains all important facts discovered or announced during the 

 year. B3~ Each volume is distinct in itself, and contains entirely new matter. 



THE PLURALITY OF WORLDS. A NEW EDITION. With a SUPPLE- 

 MENTARY DIALOGUE, in which the author's Reviewers are reviewed. 12mo, 

 cloth, 1.50. 



THE ROMANCE OF NATURAL HISTORY. By PHILIP HENRY 

 GOSSE. With numerous elegant Illustrations. 12mo, cloth, 1.75. 



THE NATURAL HISTORY OF THE HUMAN SPECIES; Ita 



Typical Forms and Primeval Distribution. By CHARLES HAMILTON SMITH. 

 With an Introduction containing an Abstract of the views of Blumenbach, 

 Prichard, Bachman, Agassiz, and other writers of repute. By SAMUEL KNEE- 

 LAND, Jr., M. D. With elegant Illustrations. 12mo, cloth, 1.75. 



TREATISE ON THE COMPARATIVE ANATOMY OF THE AN- 

 IMAL KINGDOM. By Profs. C. TH. VON SIEBOLD and H. STANNIUS. 

 Translated from the German, with Notes, Additions, &c. By WALDO I. BUR- 

 NETT, M. D., Boston. One elegant octavo volume, cloth, 3.50. 

 This is believed to be incomparably the best and most complete -work on the subject extant. 



THE CAMEL; His Organization, Habits, and Uses, considered with refer 

 ence to his introduction into the United States. By GEOKGE P. MARSH, lute 

 U. S. Minister at Constantinople. 12mo, cloth, 75 cts. 



INFLUENCE OF THE HISTORY OF SCIENCE UPON INTEL- 

 LECTUAL EDUCATION. By WILLIAM WHEWELL, D. D., of Trinity 

 College, England, and the alleged author of u Plurality of Worlds." 1'^mo, 

 cloth, 40 cts. 



KNOWLEDGE IS POWER. A view of the Productive Forces of Modenj 

 Society, and the Results of Labor, Capital, and Skill. By CHARLES KNIGHT. 

 With numerous Illustrations. American Edition. Revised, Avith additions, by 

 DAVID A. WELLS, Editor of the "Annual of Scientific Discovery." 12mOt 

 cloth, 1.75. 



