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Updated: May 8, 2025
The last reckoning of which they were capable before Glaisher lost consciousness showed an elevation of twenty-nine thousand feet, but it is supposed that they ascended eight thousand feet higher before Coxwell was able to open the descending valve.
Under these circumstances, the presence of cirrus clouds far above this dry region, apparently as much above as when viewed from the earth, is very remarkable, and leads to the conclusion that they are not composed of water. In the propagation of sound, M. Glaisher made many curious experiments.
The only course was to descend, and though this was not at once practicable, owing to Savernake Forest being beneath us, we effected a safe landing in the first available clearing. As has been mentioned, Mr. Glaisher and other observers have recorded several remarkable instances of opposite wind currents being met with at moderate altitudes.
T. L. Phipson, is edited by Mr. Glaisher, and many of the experiences he relates will be found to contrast with those of others.
Glaisher. The noise of London streets as heard from above has much diminished during the last fifteen years' probably owing to the introduction of wood paving. But, forty years ago, Mr. Glaisher describes the deep sound of London as resembling the roar of the sea, when at a mile high; while at greater elevations it was heard at a murmuring noise.
It is natural to suppose that the second sun was formed by the reflection of the sun's rays upon the horizontal faces of the ice crystals floating in this high cloud. Welsh, Glaisher and Coxwell.
Glaisher adds that no inconvenience followed his insensibility, and presently dropping in a country where no conveyance of any kind could be obtained, he was able to walk between seven and eight miles. The interesting question of the actual height attained is thus discussed by Mr. Glaisher: "I have already said that my last observation was made at a height of 29,000 feet.
The balloon rose 22,930 feet, and the lowest temperature observed was 26 degrees below zero. It is to Mr. Glaisher and Mr. Coxwell, however, that the highest honours of scientific aerostation belong. The ascents made by these gentlemen Mr. Glaisher being the scientific observer, and Mr. Coxwell the practical aeronaut have become matters of history.
From observations already recorded in this volume notably those of Gay Lussac, Welsh, and Glaisher it has been made to appear that, in ascending into the sky in daytime, the temperature usually falls according to a general law; but there are found regions where the fall of temperature becomes arrested, such regions being commonly, though by no means invariably, associated with visible cloud.
Fashionable society soon turned to pursuits other than watching balloon ascents, however, and the joys of the air were confined to a few adventurous spirits, such as Green and Holland, who first substituted coal gas for hydrogen and in 1836 made a voyage of 500 miles from Vauxhall Gardens to Weilburg in Nassau, and James Glaisher, who in the middle of the century began to make meteorological observations from balloons, claiming on one occasion, in 1862, to have reached the great height of 7 miles.
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