d when the puffsfollow each other insufficiently quick succes-sion they combine, justas any other vibrations,to form a sound of lowor higher pitch accor-ding to their frequency.When the rate of revo-lution and the numberof perforations of the disk are known, the rate of vibra-tion of the sound… … o O
Patents · Improved · Valve · Attached · Pivoted · Boiler · Scientific American · Iron · High steam · Steam pressure · Low water · Trade catalogs · Sewing machine · Address munn · Carbonic acid · Piston rod · Steam gage
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
