File talk:Pickett slide rule.jpg

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This file was marked as equivalent to w:Image:Pocket_slide_rule.jpg from en.wikipedia.org according to the NowCommons tag.

This is the edit history for that file's page:

• [2005-04-23T19:18:56Z] Bcrowell (This is a scan of a Pickett pocket slide rule, done by Benjamin Crowell in 2005. The slide rule does not have a copyright notice on it, and works published in the U.S. without a copyright notice before 1977 are in the public domain. I therefore think the)
• [2005-04-23T19:25:16Z] Bcrowell
• [2006-05-04T02:35:15Z] M1ss1ontomars2k4 (note about apollo)
• [2006-10-12T01:52:07Z] Cinxx

Original title:

• Pocket_slide_rule.jpg

Upload log:

• (del) (cur) 19:33, 23 April 2005 . . Bcrowell (Talk | contribs) . . 558×152 (20,510 bytes) (This is a scan of a Pickett pocket slide rule, done by me, Benjamin Crowell, in 2005. The slide rule does not have a copyright notice on it, and works published in the U.S. without a copyright notice before 1977 are in the public domain. I therefore think)
• (del) (rev) 19:24, 23 April 2005 . . Bcrowell (Talk | contribs) . . 634×174 (25,206 bytes) (This is a scan of a Pickett pocket slide rule, done by Benjamin Crowell in 2005. The slide rule does not have a copyright notice on it, and works published in the U.S. without a copyright notice before 1977 are in the public domain. I therefore think the )
• (del) (rev) 19:18, 23 April 2005 . . Bcrowell (Talk | contribs) . . 652×203 (27,548 bytes) (This is a scan of a Pickett pocket slide rule, done by Benjamin Crowell in 2005. The slide rule does not have a copyright notice on it, and works published in the U.S. without a copyright notice before 1977 are in the public domain. I therefore think the )

Text:

This is a scan of a Pickett pocket slide rule, done by me, Benjamin Crowell, in 2005. The slide rule does not have a copyright notice on it, and works published in the U.S. without a copyright notice before 1977 are in the public domain. I therefore think the slide rule itself is in the public domain under U.S. law. I'm making my scan available under the GFDL license.
{{GFDL 1.2}}
Note: a similar model was used on the Apollo manned moon missions as a backup in case the computers failed.

Poccil 21:53, 15 October 2006 (UTC)