All In
Posts Comments

The long, long road to precise navigation » sundial

This sundial birdbath only tells time after a fashion. Navigation needed real timepieces. (photo by L, Martin)

compass1

This entry was posted on Tuesday, April 16th, 2013 at 7:13 pm and is filed under . You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

Leave a Reply

You must be logged in to post a comment.