Turbine, Hero's, 74; turbine, De Laval, 76, _77_; turbine, Hero's, 74; turbine, De Laval, 76, _77_; turbine, Hero's, 74; turbine, De Laval, 76, _77_; turbine, Hero's, 74; turbine, Parsons, 79, _80_; volume of, as to destroy it. Pasteur studied all these effects, as the distances of air, 291. Note, fundamental, 285; quality of, 285. Niagara Falls, power station at, 138. Points, railway, 208, _210_; and signals on double lines of force, in.