known bird. Finally, it may not be a logical deduction, but to my imagination it is far more satisfactory to look at such instincts as the young cuckoo ejecting its fosterbrothers,-ants making slaves,-the larvæ of ichneumonidæ feeding within the live bodies of caterpillars,not as specially endowed or created instincts, but as small consequences of one general law leading to the advancement of all organic beings,--namely, multiply vary, let the strongest live and the weakest die. THE END OF VOL L ORIGIN CHARLES DARWIN'S WORKS. OF SPECIES BY MEANS OF NATURAL SELECTION, OR THE PRESERVATION OF FAVORED RACES IN THE STRUGGLE FOR LIFE. Revised edition, with Additions. 12mo. Cloth, $2.00. 12mo. DESCENT OF MAN, AND SELECTION IN RELATION JOURNAL OF RESEARCHES INTO THE NATURAL EMOTIONAL EXPRESSIONS LOWER ANIMALS. 12mo. Cloth, $3.50. THE VARIATIONS OF ANIMALS AND PLANTS UNDER DOMESTICATION. With a Preface, by Professor ASA GRAY. 2 vols. Illustrated. Cloth, $5.00. INSECTIVOROUS PLANTS. 12mo. Cloth, $2.00. MOVEMENTS AND HABITS OF CLIMBING PLANTS. With Illustrations. 12mo. Cloth, $1.25. THE VARIOUS CONTRIVANCES BY WHICH ORCHIDS ARE FERTILIZED BY INSECTS. Revised edition, with Illustrations. 12mo. Cloth, $1.75. THE EFFECTS OF CROSS AND SELF FERTILIZATION IN THE VEGETABLE KINGDOM. 12mo. Cloth, $2.00. DIFFERENT FORMS OF FLOWERS ON PLANTS OF THE SAME SPECIES. With Illustrations. 12mo. Cloth, $1.50. THE POWER OF MOVEMENT IN PLANTS. DARWIN, LL. D., F. R. S., assisted by FRANCIS DARWIN. trations. 12mo. Cloth, $2.00. BY CHARLES With Illus THE FORMATION OF VEGETABLE MOULD THROUGH THE ACTION OF WORMS. With Observations on their Habits. With Illustrations. 12mo. Cloth, $1.50. New York: D. APPLETON & CO., 1, 3, & 5 Bond Street. D. APPLETON & CO.'S PUBLICATIONS. THOMAS H. HUXLEY'S WORKS. SCIENCE AND CULTURE, AND OTHER ESSAYS. 12mo. THE CRAYFISH: AN INTRODUCTION TO THE STUDY OF ZOOLOGY. With 82 Illustrations. 12mo. Cloth, $1.75. SCIENCE PRIMERS: INTRODUCTORY. 18mo. Flexible cloth, 45 cents. MAN'S PLACE IN NATURE. 12mo. Cloth, $1.25. ON THE ORIGIN OF SPECIES. 12mo. Cloth, $1.00. MORE CRITICISMS ON DARWIN, AND ADMINISTRATIVE NIHILISM. 12mo. Limp cloth, 50 cents. MANUAL OF THE ANATOMY OF VERTEBRATED ANIMALS. Illustrated. 12mo. Cloth, $2.50. MANUAL OF THE ANATOMY OF INVERTEBRATED ANIMALS. 12mo. Cloth, $2.50. LAY SERMONS, ADDRESSES, AND REVIEWS. 12mo. Cloth, $1.75. CRITIQUES AND ADDRESSES. 12mo. Cloth, $1.50. AMERICAN ADDRESSES; WITH A LECTURE ON THE STUDY OF BIOLOGY. 12mo. Cloth, $1.25. PHYSIOGRAPHY: AN INTRODUCTION TO THE STUDY OF NATURE. With Illustrations and Colored Plates. 12mo. Cloth, $2.50. HUXLEY AND YOUMANS'S ELEMENTS OF PHYSIOLOGY AND HYGIENE. By T. H. HUXLEY and W. J. YOUMANS, 12mo. Cloth, $1.50. New York D. APPLETON & CO., 1, 3, & 5 Bond Street. JOHN TYNDALL'S WORKS. ESSAYS ON THE FLOATING MATTER OF THE AIR, in Relation to Putrefaction and Infection. 12mo. Cloth, $1.50. ON FORMS oF WATER, in Clouds, Rivers, Ice, and Glaciers. With 35 Illustrations. 12mo. Cloth, $1.50. HEAT AS A MODE OF MOTION. New edition. 12mo. Cloth, $2.50. ON SOUND: A Course of Eight Lectures delivered at the Royal Institution of Great Britain. Illustrated. 12mo. New edition. Cloth, $2.00. FRAGMENTS OF SCIENCE FOR UNSCIENTIFIC PEOPLE. 12mo. New revised and enlarged edition. Cloth, $2.50. LIGHT AND ELECTRICITY. 12mo. Cloth, $1.25. LESSONS IN ELECTRICITY, 1875-'76. 12mo. Cloth, $1.00 HOURS OF EXERCISE IN THE ALPS. With Illustrations. 12mo. Cloth, $2.00. FARADAY AS A DISCOVERER. A Memoir. 12mo. Cloth, $1.00. CONTRIBUTIONS TO MOLECULAR PHYSICS in the Domain of Radiant Heat. $5.00. SIX LECTURES ON LIGHT. Delivered in America in 1872'73. With an Appendix and numerous Illustrations. Cloth, $1.50. FAREWELL BANQUET, given to Professor Tyndall, at Del monico's, New York, February 4, 1873. Paper, 50 cents. ADDRESS delivered before the British Association, assembled at Bel fast. Revised with Additions, by the author, since the Delivery 12mo. Paper, 50 cents. New York: D. APPLETON & CO., 1, 8, & 5 Bond Street |