Abstract
The light of a condenser discharge through hydrogen, emitting the Balmer series of lines, persists for much longer than current theories and experimental determinations of the time of relaxation of the hydrogen atom would lead one to anticipate. These determinations indicate a time of the order of 10
-8
sec. for the intensity to diminish in the ratio
e
: 1. It is shown in the present paper that in fact, if hydrogen made luminous by a powerful discharge is blown out of the electric field by its own expansion, the time in question is under some conditions a thousand times more. The discrepancy is not cleared up, but the aim has been to present the evidence as clearly as possible for criticism.
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