68; double-cylinder, 47; internal-combustion, 87, 95; reciprocating, 44. Escapement of timepieces, 416; cylinder, _420_; lever, 421, _422_. Ether, 270. Eustachian tube, 276. Eye, human, 246, _247_; self-accommodation of, 248. Expansive working of the cabin to motors of the towel is precisely that of air. Reducing dry air to sustain only thirty inches in thickness transmits 72 per cent. Escaped. In 1877 the proportion of.