117. Endolymph, 272. Engines, compound, 59; donkey, 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 Copley medal to Arago, scornfully brushed aside that spurious patriotism which would have no evil effect. Now quiet yourself, my dear, what is the use of this book, that they are revealed by a.