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71.

but free fall can be satisfactorily prevented by a suitable parachute.  A parachute will be operative for the reason that velocities and small atmospheric densities are essentially the same as low velocities and ordinary density.

9. Even if a mass of the order of a pound were propelled by the apparatus under consideration until it possessed sufficiently velocity to escape the earth's attraction, the initial mass need not be unreasonable large, for an effective velocity of ejection which is without doubt attainable.  A method is suggested whereby the passage of a body to such an extreme altitude could be demonstrated.

[[underlined]] CONCLUSION [[/underlined]].

Although the present paper is not the description of a working model, it is believe, nevertheless, that the theory and experiments, herein described, together settle all points that could seriously be questioned; and that it remains only to perform certain necessary preliminary experiments before an apparatus can be constructed that will carry recording instruments to any desired altitude.