The Americans, with that vigour of conception and promptitude in action for which they are celebrated, have done a good deal in the cause of aerostation; but, as their doings and experiences have been in many respects similar to those men whose voyages have been already recounted or touched upon, it would involve too much repetition to detail them here. Some of their attempts, however, have outshone those of the men of the eastern hemisphere. For instance, Mr J. Wise, a noted aeronaut, has several times exploded his balloons while in the air, to show that the fragments with net-work form a sort of parachute which moderates the descent. He also, with Mr La Mountain and others, accomplished in 1859 the longest flight on record, namely, 1150 miles in less than twenty hours; and the latter gentleman did 300 miles in four hours in the same year. Another American, Mr Lowe, made an enormous balloon, with which he resolved to cross the Atlantic in about 48 hours. We await the accomplishment of this feat with much solicitude! In conclusion, we may say that the subject of aerostation is still in its infancy, and that we have still to learn how to conduct ourselves properly when--Up in the Clouds. THE END.