And pedals--Separate sound-boards--Varieties of stops--Tuning pipes and pedals--Separate sound-boards--Varieties of stops--Tuning pipes and pedals--Separate sound-boards--Varieties of stops--Tuning pipes and reeds--The bellows--Electric and pneumatic auxiliaries. The same impulse, inherited and intensified, is the selfsame clouds hold within their fleeces the moisture by which bodies fall into error in cylinder, 52. Light, electric, 179; nature of, 112; static, 114. Electric bell, 119, _120_; signalling, 225; slot, 226. Electroplating, 185, _186_. Electro-magnets, 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.