Again, and still by way of preliminary consideration, we must remember that the analogy of the growing child, although most valuable up to a certain point, is not to be unreservedly followed where we have to deal with the genesis of speech. For, as previously noted, to the infancy of the individual language is supplied from without, and has only to be learnt; while to the infancy of the race language was not supplied, but had to be made. Therefore, even apart from any question of heredity, we have here an immense difference in the psychological conditions between the case of a growing child and that of aboriginal man. Only in so far as the growing child displays the tendency on which I have dwelt of spontaneously extending the significance of denotative words, or of spontaneously using such words in apposition for the purpose of pre-conceptual predication—only to this extent may we hope to find any true analogy between the individual and the race in respect of that “transition” from receptual to conceptual ideation with which we are now concerned.[306] There is another preliminary consideration which I think is well worth mentioning. The philologist Geiger is led by his study of language to entertain, and somewhat elaborately to sustain, the following doctrine. First he points out that man, much more than any other animal, uses the sense of sight for the purposes of perceptual life. By this he does not mean that man possesses a keener vision than any other animal, but merely that of all his special senses that of sight is most habitually used for taking cognizance of the external world. And this, I think, must certainly be admitted. Even a hitherto speechless infant may be seen to observe objects at great distances, carefully to investigate objects which it holds in its hands, and generally to employ its eyes much more effectively than any of the lower animals at a comparable stage of development. Now, from this relative superiority of the sense of sight in man, Geiger argues that before the origin of articulate speech he, more than any other animal, must have been accustomed to communicate with his fellows by means of signs which appealed to that sense—_i.e._ by gesture and grimace. But, if this be admitted, it follows that from the time when a particular species of the order Primates began to use its eyesight more than the allied species, a condition was given favourable to the subsequent and gradual development of a gesticulating form of ape-like creature. Here grimace also would have played an important part, and where attention was particularly directed towards movements of the mouth for semiotic purposes, articulate sounds would begin to acquire more or less conventional significations. In this way Geiger supposes that the conditions required for the origin of articulate signs were laid down; and, in view of all that he says, it certainly is suggestive that the animal which relies most upon the sense of sight is also the animal