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[https://www.academia.edu/106602741/Another_Kind_of_Light_The_Work_of_T_J_Seebeck_and_His_Collaboration_with_Goethe_Part_2](https://www.academia.edu/106602741/Another_Kind_of_Light_The_Work_of_T_J_Seebeck_and_His_Collaboration_with_Goethe_Part_2)