One small glass bottle with cork stopper, associated with, found with mass spectrograph One small glass bottle with cork stopper
Ruhmkorff induction coil for original mass-spectrograph by F.W. Aston Ruhmkorff induction coil for original mass-spectrograph by F.W. Aston 1919
Electromagnets by The Erasmic Co. Ltd., Warrington; England for original mass spectrograph by F.W. Aston. Electromagnets, for Aston's first mass spectrograph, c. 1919. 1919