Naturally, perhaps, my mind attempted, as it so often had done, to urge objections to his statements, and at first it occurred to me that I did not experience the peculiar sinking away sensation in the chest that I remembered follows, on earth, the downward motion of a person falling from a great height, or moving rapidly in a swing, and I questioned him on the absence of that phenomenon. "The explanation is simple," he said; "on the surface of the earth a sudden motion, either upward or downward, disturbs the equilibrium of the organs of respiration, and of the heart, and interferes with the circulation of the blood. This produces a change in blood pressure within the brain, and the 'sinking' sensation in the chest, or the dizziness of the head of a person moving rapidly, or it may even result in unconsciousness, and complete suspension of respiration, effects which sometimes follow rapid movements, as in a person falling from a considerable height. Here circumstances are entirely different. The heart is quiet, the lungs in a comatose condition, and the blood stagnant. Mental sensations, therefore, that result from a disturbed condition of these organs are wanting, and, although we are experiencing rapid motion, we are in the full possession of our physical selves, and maintain our mental faculties unimpaired." Again I interposed an objection: "If, as you say, we are really passing through an attenuated atmosphere with increasing velocity, according to the law that governs falling bodies that are acted upon by gravity which continually accelerates their motion, the friction between ourselves and the air will ultimately become so intense as to wear away our bodies." "Upon the contrary," said he, "this attenuated atmosphere is decreasing in density more rapidly than our velocity increases, and before long it will have altogether disappeared. You can perceive that the wind, as you call it, is blowing less violently than formerly; soon it will entirely cease, as I have already predicted, and at that period, regardless of our motion, we will appear to be stationary." Pondering over the final result of this strange experience I became again alarmed, for accepting the facts to be as he stated, such motion would ultimately carry us against the opposite crust of the earth, and without a doubt the shock would end our existence. I inquired about this, to me, self-evident fact, and he replied: "Long before we reach the opposite crust of the earth, our motion will be arrested."