By extending your limbs, in stretching out your arms, or standing on your toes, the centrifugal action is instrumental in parting the jaws and giving the tongue an upward tendency. In so doing, the œsophagus and replica obtain ascendancy over the trachea and the larynx. The abdomen (the seat of gravitation for English speech) and its tributaries thus obtain the mastery over the thorax and its tributaries. The former being the main vehicle for English speech, such speech can be produced without molestation. These facts, while favorable to the production of English vocal utterance, obstruct and hinder German vocal utterance. In lowering the arms or standing on one's heels, thus substituting centripetal for centrifugal action, the jaws close, the tongue assumes a downward tendency. The trachea and the larynx, as well as the thorax (the seat of gravitation for German vocal utterance), obtain the preponderance, and German may be freely spoken, while English is obstructed. In _raising_ the tongue, a free passage to the œsophagus is obtained, while that to the trachea is obstructed. In _lowering_ the tongue, a free passage to the trachea is obtained, while that to the œsophagus becomes obstructed. It is necessary, however, to understand that, while English speech is centrifugal and German centripetal, these are _tendencies_ only and not permanent _conditions_; centrifugal and centripetal action constantly interchanging and modifying one another. An uninterrupted tendency in one and the same direction, either centripetally or centrifugally, would soon come to an end and produce stagnation, inertia, death. There is no action without a counteraction. Hence, ingoing vocal sounds are counterbalanced by outgoing; the same as ingoing thoughts or thoughts produced by external vision are counterbalanced by outgoing, or thoughts produced by internal vision, etc. In addition to the parts mentioned, there are many other parts of the body which, subjected to centrifugal or centripetal action, will produce results of the same order as those already mentioned. In stretching out your legs (while in a sitting position), you will find speaking German to be difficult; upon drawing them up, you will have trouble with English. The same results may be obtained, in connection with the toes and fingers, in a number of different ways. From all this, it will be readily seen that all parts of the body are closely related to each other, the tendency of the muscles in one prominent part producing the same tendency in all the rest.