Progress has been immense, and yet our systems remain very unsatisfactory; the skull seems to escape every method of measurement. Some time ago a meeting of craniologists took place at Gottingen, and yet the learned assembly was obliged to separate without settling anything.[333] It seems that the old saying of Bernard Palissy about measuring some peculiar skull, will remain true in spite of all our efforts: “I have never known how to obtain a correct measurement.”[334] Another method is that of Morton, to which he has attached his name by the multiplicity of facts which he has drawn, from it, by the justice of the views which he has expressed, after having used it thousands of times; we speak of the direct measurement of the interior capacity of the skull. It is for ever to be regretted that Morton finished his laborious career without having been able to publish the ultimate results of his long researches; but this method (which M. Broca has actively applied), is, however, not quite perfect. If there was merely a difference among the different races in the amount of intellect shown in their works, this measurement would be sufficient to establish a division; but there is more than that; all races have different aptitudes, and here is to be found the fault of Morton’s system, which only takes the whole, which makes no distinction between very different skulls if they have the same volume, like those of the Esquimaux, for instance, and those of Americans. The subject of measurement differs, like intellect, otherwise than merely in dimension, and that which craniology wants is the definition of all these special tendencies of the intellect by as many tangible varieties as possible.[335]