We have no occasion to take the slightest exception to this statement of Professor Donaldson's. But we are at a loss to perceive any support it gives to the general contention of this address, which, indeed, it seems to overturn completely. Observe especially that Donaldson recognizes unequivocally "the great point of divergence at adolescence" "in the capacity for education, between the lower and higher races." We may be allowed to add some later remarks of the Chicago authority, culled from his "The Growth of the Brain" (1895), which also fully sustain, incidentally, the theses of our earlier chapters. "Statistically the results are satisfactory" (p. 114), being said of a table showing the inferior brain-weights of inferior races, indicates that Professor Donaldson recognizes that inferiority unreservedly. "On neurological grounds, therefore, nurture is to be considered of much less importance than nature, and in that sense the capacities we most admire in persons worthy of remark are certainly inborn rather than made" (p. 344). "Size, therefore, has a meaning; but it is by no means entitled to dominate the whole interpretation of the central system" (p. 352). "No amount of education will cause enlargement or organization where the rough materials, the cells, are wanting; and, on the other hand, where these materials are present, they will in some degree become evident, whether purposely educated or not" (p. 355). "Races which have progressed farthest in civilization are also those which possess a large brain-weight; but the converse of this proposition is by no means true, for the tables also show that there are races possessed of a large brain-weight and yet uncivilized" (p. 359). Having now reviewed all pertinent anatomical differences, Dr. Boas declares (p. 317): "Our conclusion is, that there are differences between the physical characters of races which make it probable that there may be differences in faculty. No unquestionable fact, however, has been found yet which would prove beyond a doubt that it will be impossible for certain races to attain a higher civilization."