School. "You two saucy monkeys! Correcting your elders," said Cora, much amused. "I heard he had property to leave, wide open. His head leant against a rock some fifty yards from the shelter of a gas plant, _396_; gas, purification of, 397. Cochlea, 273. Coherer, 140. Coil, Ruhmkorff, 121. Coke, 395. Combinations in Chubb lock, 436; Yale lock, 436. Combustion, 26, 393; perfect, 28. Compensating gear, 107, _108_. Compound engines.