THE ORIGIN OF SPECIES BY MEANS OF NATURAL SELECTION, OR THE PRESERVAT VAZION ON OF FAVORED RACES IN THE STRUGGLE BY CHARLES DARWIN, M. A., F. R. S., AUTHOR OF "JOURNAL OF RESEARCHES DURING H. M. 8. BEAGLE'S VOYAGE round D. APPLETON AND COMPANY, 549 & 551 BROADWAY. 1875. |