. Collier's new encyclopedia : a loose-leaf and self-revising reference work ... with 515 illustrations and ninety-six maps. Paris in a balloon filled with heatedrir, remaining above the earth 25 min-utes. A few days later, Dec. 1, an ascentwas made by Messrs. Charles and Robertsin a balloon filled with hydrogen the two years ensuing, many flightswere made, the most notable of whichwas that of Blanchard, the Englishman,who, accompanied by an American, Dr. AERONAUTICS 41 AERONAUTICS Jeffries, crossed the English Channelfrom Dover and landed at Calais. Up to this time ballooning had beenc
. Collier's new encyclopedia : a loose-leaf and self-revising reference work ... with 515 illustrations and ninety-six maps. Paris in a balloon filled with heatedrir, remaining above the earth 25 min-utes. A few days later, Dec. 1, an ascentwas made by Messrs. Charles and Robertsin a balloon filled with hydrogen the two years ensuing, many flightswere made, the most notable of whichwas that of Blanchard, the Englishman,who, accompanied by an American, Dr. AERONAUTICS 41 AERONAUTICS Jeffries, crossed the English Channelfrom Dover and landed at Calais. Up to this time ballooning had beencarried on as an adventure or a intervened, and sought throughthis novel medium to ascertain scientificdata that so far had been based onlyon conjecture. The first ascent withthis object in view was made in 1804from Paris. It was learned that as theballoon rose the air became drier andthat at 23i,000 feet the chemical com-position of the air did not vary fromthat at the surface of the earth. The two most notable ascents recordedwere those made by Glaisher and Cox-well in September of 1862 and of Berson. SPHERICAL BALLOON—UNITED STATES and Suring, July 31, 1901. In the formerascent it was claimed that a height ofseven miles was reached, but this wasnot susceptible of proof, because at 29,-000 feet Glaisher lost consciousness. Theascent continued until Coxwell, who was almost paralyzed, opened the valve withhis teeth, and the balloon finally landedwith both passengers safe. More reliablefigures as to altitude were those recordedby Berson and Suring, when they as-cended from Berlin to a height of This is the greatest height thathas ever been attained by men in a bal-loon, although it was exceeded by MajorSchroeder of America who reached ai>altitude of 33,113 feet in an airplane. Within the last twenty-five years, manynotable balloon flights have been re-corded, some of them negotiated withgreat risk to the aerial adventurers. Upto the present century
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