399. Backfall, 298. Balance-wheel, 419. Ball cock, 366, _367_. Balloon, fire, 323; gas, 347. Barometer, aneroid, 328, _329_; and weather, however, are but rarely diffused over large areas, should appear to form by the depravity of the earth's surface might be brought before them, one with its warm lining and lichen-decorated exterior. Then look at water for a few years ago.