By Milledge Prints
Carel Nicolaas Storm van 's-Gravesande (Dutch, 1841 - 1924)
Edward Theodore Compton (German, 1849-1921)
William Trost Richards (American, 1833-1905)
Carl Frederik Sørensen (Danish, 1818-1879)
Carl Wilhelm Bøckmann Baarth (Norwegian, 1847 – 1919)
Abraham Hulk (Dutch, 1813-1897)