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the base of the brain, and in the ears, when the ascent is sudden.

It is impossible to hold a level position in the body of a thunder cloud. You are all the time going up or down. The vortex current carries you up through the central part of the cloud diverging the ballon outward with the outspreading vapor, upon which it describes its outward and downward course, generally to be drawn in again near the base of the cloud, and from there upward on the uprising stream, and so on, like an endless chain, until you leave it by an increase of levitating force from its top, or an increase of gravitating force at its base, in the one case by a copious discharge of ballast, in the other by a copious discharge of gas.

To explore one of these meteors, is, at first, calculated to produce a degree of anxious solitude, but when experienced for a while, and duly considered, the experience becomes interesting and sublime, and well calculated to inspire the meteorologist with a desire to renew the investigation of atmospheric phenomena.

There is no disc rotation in a storm cloud, but there is a vorticle rotation in its centre, caused by the two forces of the inrushing and uprushing air, shown in the swinging and rotating motion it gives to the balloon. This inward motion of the air towards the vortex of the cloud extends beyond the outer margin of the meteor and will gradually draw the balloon towards and into the vortex. This can be prevented by giving the ballon an upward or downward motion as in either case the centre of the storm will recede from the air ship and thus we have the power of riding in the wake, or in the midst of a thundergust.