Cavendish Laboratory : Aston's first mass spectrograph (1919)

Cavendish Laboratory

<p style='text-align: justify;'>Black and white photograph of Aston's first mass spectrograph set up in the lab oratory. It was used with the old du Bois magnet. Two variable resistors are in the bottom right hand corner of the image. The first mass spectrograph of 1919 was a great success in establishing the existence of isotopes of neon, chlorine, bromine and krypton. By 1925, Aston had used this mass spectrograph to measure the masses of the isotopes of over 50 elements. Aston won the 1922 Nobel Prize in Physics for this work.</p>