Assertion: gas | /r/AtLocation | the balloon
Facets:
Source sentences:
text: By giving the balloon these cubic dimensions, and filling it with hydrogen gas , instead of common air--the former being fourteen and a half times lighter and weighing therefore only two hundred and seventy-six pounds--a difference of three thousand seven hundred and twenty-four pounds in equilibrium is produced; and it is this difference between the weight of the gas contained in the balloon and the weight of the surrounding atmosphere that constitutes the ascensional force of the former.