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.
There are lots of swimming spots in spring and summer in Yosemite Valley along the Merced River. One of my favorites is the sandy beach near Sentinel Bridge, with its lovely view of Half Dome. When the water level is high enough you can also swim in Tenaya Creek and Mirror Lake.