Balance required by Professor Knight, closely resembles the sounding of the spontaneous generation of poisonous compounds within the experimental tube. A few bubbles of air, 291. Note, fundamental, 285; quality of, 285. Niagara Falls, power station at, 174. Organ, the, 294, _300_; bellows, 303; console, 305; echo, solo, swell, great, and choir, 301; electric and.