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
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