Used with
permission of Maiken Naylor, University at Buffalo, Buffalo, NY, USA,
http://ublib.buffalo.edu/libraries/units/sel/exhibits/stamps
..Antoine Henri
Becquerel
..Modern
Physics part II
..Irene &
Frederic Joliot-Curie
..Pieter Zeeman & Hendrik Antoon Lorentz
..Johannes Stark
..Philip Morrison
..Marie Sklodowska
Curie
..Wilhelm Conrad
Roentgen
..Modern
Physics part I