http://en.wikipedia.org/wiki/Charles-Augustin_de_Coulomb http://www.corrosion-doctors.org/Biographies/CoulombBio.htm_ Coulomb's Torsion Balance http://www.youtube.com/watch?v=FYSTGX-F1GM

TOKYO_SUNRISE-04:25 SUNSET-18:58 MOON-12.2DAYS_ Aurora Over the Yukon http://news.nationalgeographic.com/news/2011/06/pictures/110609-solar-flare-space-148-science-mars-sun-nebula-aurora/世界献血者デー(World Blood Donor Day), 花の日, フラ…