The Phonautograph and Precursors to Edison's Phonograph. An 1859 Koenig phonautograph. While Thomas Edison is rightly credited with the invention of the cylinder phonograph and the means of playing back sound, his ideas were clearly influenced by numerous others who preceded him.
itâs best time to climb El Capitan or Raft along the Merced River. Also, spring if best time to see the Yosemite Falls in all their glory, âwhen melting snow fills the streams with volume. Yosemite is one of the best places in the US to observe the planets, stars, and galaxies.
National Park Service - Yosemite Camping. Yosemite National Park has 13 popular campgrounds, of which up to seven are on a reservation system. From April through September, reservations are essential and even the first-come, first-served campgrounds often fill by noon from May through September.