“By allowing the positive ions to pass through an electric field and thus giving them a certain velocity, it is possible to distinguish them from the neutral, stationary atoms.”
Other Johannes Stark Quotes
The most common and most important result of them is that the nature and size of the effect on corresponding series of different elements are largely an expression of the peculiarity of their atomic structure - or, at least, of the structure of the surface.
Johannes Stark 
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The question of the composition of perceptible objects is one which already occupied the mind of the ancient Greeks.
Johannes Stark
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The discovery of various phenomena has led to a recognition of the fact that the chemical atom is an individual which again is itself made up of several units into a selfcontained whole.
Johannes Stark
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Thus at the beginning of 1906 it seemed to be established that the emitters of the spectral series of chemical elements are their positive atomic ions.
Johannes Stark
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The movement of the emitters of the spectral lines may be deduced on the basis of the Doppler principle.
Johannes Stark
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