Pinboard (dmer) https://pinboard.in/u:dmer/public/ recent bookmarks from dmer The Citizen Scientist - The Official Publication of the Society for Amateur Scientists 2010-05-17T19:10:01+00:00 http://www.sas.org/tcs/weeklyIssues_2010/2010-05-07/project1/index.html dmerdiy photo photography pinhole camera solargraph https://pinboard.in/u:dmer/b:113acbaf4ff4/