Entered according to Act of Congress, in the year 1882, by WARREN F. DRAPER, in the Office of the Librarian of Congress at Washington. ΤΟ PROF. ASA GRAY, WHOSE DISCUSSIONS OF NATURAL THEOLOGY ARE AS PERSUASIVE AS HIS CONTRIBUTIONS TO BOTANY ARE AUTHORITATIVE, This Volume is Juscribed, WITH THE AFFECTION AND ESTEEM OF THE AUTHOR. gift PREFACE. STRICTLY speaking, the present volume is a companion to the Logic of Christian Evidences, they being together the partial outcome of the author's studies in Inductive Logic, begun fourteen years ago. It was at first decided to style this, The Unity of Method in Science and Religion; but that would have been more appropriate as a designation for the two volumes considered together as developments of the same principles when applied to different subjects. The Logic of Christian Evidences might be taken as an illustration of the inductive method applied to the proof of Christianity, while the bulk of this may be regarded as an application of the same principles to the two most prominent scientific questions now engrossing the attention of the public. We do not care to conceal our growing conviction that the best defences of Christianity, so far as it is a system of positive revelation, are not to be |