It was a small number of entries this time, but not lacking in quality, I'm sure. Please vote for the picture that represents our theme the best. The main subject of that picture has to be a lighthouse. 1. Integral 2. hypatia 3. larkspur 4. Janus 5. ZapperZ 6. GeoMike https://www.physicsforums.com/showthread.php?t=143033" Zz.