changes in the mechanical appliances of ordinary life during the last three generations have been greater than in all the preceding generations since history dawned. I speak of the science which has no more direct bearing upon the affairs of our everyday life than literature or music, painting or sculpture, poetry or history. A hundred years ago the ordinary man of cultivation had to know something of these last subjects; but the probabilities were rather against his having any but the most superficial scientific knowledge. At present all this has changed, thanks to the interest taken in scientific discoveries, the large circulation of scientific books, and the rapidity with which ideas originating among students of the most advanced and abstruse sciences become, at least partially, domiciled in the popular mind.
Another feature of the change, of the growth in the position of science in the eyes of every one, and of the greatly increased respect naturally resulting for scientific methods, has been a certain tendency for scientific students to encroach on other fields. This is particularly true of the field of historical study. Not only have scientific men insisted upon the necessity of considering the history of man, especially in its early stages, in connexion with what biology shows to be the history of life, but furthermore there has arisen a demand that history shall itself be treated as a science. Both positions are in their essence right; but as regards each position the more arrogant among the invaders of the new realm of knowledge take an attitude to which it is not necessary to assent. As regards the latter of the two positions, that which would treat history henceforth merely as one branch of scientific study, we must of course cordially agree that accuracy in recording facts and appreciation of their relative worth and inter-
