present map is constructed by different districts, so that we can not compare valley with valley, as it would be most profitable to do. We have to be content with more general results. For purposes of orientation we have reproduced upon this sketch the rivers shown upon our map in the preceding paper, so that certain comparisons may be drawn. We have already seen that the lower Inn Valley (uppermost in our map) was a main channel of Teutonic immigration into a primitively broad-headed Alpine country by race. On the south up the Adige Valley by Trient came the second intrusive element in the long-headed brunette Mediterranean
peoples. This map at once enables us to endow each of these with its proper quota of stature; for the environment is quite uniform, considered as in this map by large districts covering valley and mountain alike. Each area contains all kinds of territory; so that we are working by topographical averages, so to speak. Moreover, the whole population is agricultural, saving a few domestic industries in the western half. Such differences as arise must be therefore in large measure due to race. The regular transition from the populations at the northeast, with generally a majority of the men taller than five feet seven inches, to the
