The U.S. Library of Congress has opened the National Jukebox, a Web site that offers Flash-based streaming access to over 10,000 78 rpm discs issued by the Victor Talking Machine Company between 1900 and 1925. (The discs have been made available thanks to blanket permission from the rights-holder, Sony Music.) Thousands more are slated to be added soon. This is one of the great promises of the Internet, though it’s worth noting that these recordings can’t be downloaded because sound recordings published before 1972 are subject to state and/or common law protection, not Federal copyright law, and thus won’t fully enter the public domain until 2067.follow link
Go Back and Forth Fast in Preview
If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.
The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).
Library of Congress National Jukebox Unveiled