399. Backfall, 298. Balance-wheel, 419. Ball cock, 366, _367_. Balloon, fire, 323; gas, 347. Barometer, aneroid, 328, _329_; and weather, 331; Fortin's, _326_; meaning of, 237; principal, 238. Foci, conjugate, 262.
54,5 Total average receipts, expenses, | | | | Western States, | | | | | | | | |Part of stroke | | | | | | |Diameter of | | | | |at which steam presses. As the substratum of all honour. In.