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Illustration of Robert Bunsen
ARP18A29_268

Illustration of Robert Bunsen

William Huggins
ARP07103_460000181

William Huggins

Spectroscope of the type used by Gustave Robert Kirchhoff
ARP07103_460000393

Spectroscope of the type used by Gustave Robert Ki...

Spectroscope of the type used by Robert Wilhelm Bunsen
ARP07103_460000534

Spectroscope of the type used by Robert Wilhelm Bu...

Spectroscope, 1872
ARP07102_390006444

Spectroscope, 1872