Keywords: Jj-thomson3.jpg Source Photo from original Rationale The artist en Arthur Hacker died in 1919 therefore PD en wikipedia Towerman 2008-05-24 published in 1907 in http //www archive org/details/lesprixnobel00clevgoog Les Prix Nobel Bletchley wikipedia en GFDL relicense PD-old-70 original upload log page en wikipedia Jj-thomson3 jpg 2008-05-24 03 13 Bletchley 634×813× 15074 bytes Source Photo from original Rationale The artist Arthur Hacker died in 1919 therefore PD PD-old-70 Joseph John Thomson Hacker |