Owing to its centrifugal tendency, it is necessary for English vocal utterance to open the mouth much wider than it is for German. Let a German open his mouth no farther for the enunciation of English than he is in the habit of opening it while speaking his own language, and he will not be able to utter a single sound. The same result will obtain when an Anglo-Saxon attempts to speak German on the same basis that he is in the habit of speaking his own language. Owing to the centripetal tendency of the German language, the mouth in speaking German is but slightly extended. That this respective widening and narrowing of, not only the mouth but of every other channel employed in bringing about vocal utterance, must tend to exercise a marked influence on Anglo-Saxon and German features will be obvious. The consequence is that the mouth of English-speaking persons in thus being extended has a broad yet narrow appearance, with rather thin and compressed lips, while the mouth of Germans in thus being contracted is comparatively smaller, with full and ripe lips. This feature is in conformity with all other features which, with Anglo-Saxons, are elongated, with Germans contracted. Experiments regarding centrifugal and centripetal action can be made to good advantage by resting your head sideways on a pillow. In this position during vocal utterance you can _feel_ these actions, and, feeling them, "_measure_" them. This mode of proceeding can be successfully adopted in many other experiments connected with these studies. I must warn the reader, however, again and again, that all this has reference only to languages spoken idiomatically correct. It has no reference whatever to foreign languages spoken in the usual mechanical manner. LANGUAGE AND MOTION I will now show that motion is the first impulse and primary condition of speech. I will give but a few examples at present, but expect to prove most exhaustively later on that motion _must_ precede, or _apparently at least_, accompany vocal sounds _always_.