The Annual Register; World Events ... Volume 104 ebook

The Annual Register; World Events ... Volume 104. Anonymous

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1863 edition. Excerpt: ...that atmospheric air expanded and became specifically lighter as its temperature was increased; and in 1782 they constructed a silk bag having a capacity of about 45 cubic feet, the sides and mouth of which were kept distended with slight hoops. A fire of paper being lighted below the mouth, the air within became rarified, and the balloon rose into the air. A public exhibition of a larger balloon, on the same principle, was made at Annonay, in 1783; the balloon ascended to an altitude exceeding a mile, but remained in the air only ten minutes, when the air within having become cooled and dense--for in neither of these experiments did the machine take up the fire with it--the balloon came to the ground. The experiments of the Mout golfiers attracted great attention throughout Europe, and many speculative men studied the subject. At Paris, M. de St. Fond raised a public subscription for repeating the experiment of Annonay; and M. Charles and MM. Roberts, to whom the design was entrusted, constructed a balloon of considerable dimensions, which they filled with hydrogen gas, generated by pouring sulphuric acid on iron filings. The plan was imperfectly executed, but the balloon rose, and was retained at a distance of about 100 feet from the ground by ropes, and was paraded by that means through the streets of Paris. Soon after, the first aerial voyage made by man was performed by Montgolfier and an officer named D'Arlandes. The balloon was constructed on the original principle--the air was rarefied by a fire below its mouth; but on this occasion the heating apparatus formed part of the machine, and was carried up with it. The experiment was successful, but the daring adventurers encountered extreme peril. MM. Charles and Roberts were fired...

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