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 24 Feb. 1876
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Continuing the pressure until the spring S was pinned between p and M
the waves became successively c and d.
- The capsule was opened and a steel spring SS (Figs 3 + 4)
held across the membrane m. Intermittent current passed through H.
Cylinder C allowed to touch spring S S. Flame curves like those shown
in d (Fig 2) made this appearance.
Similar curves were
seen when a small piece of steel spring S (Fig 5) was glued to the centre
of the membrane m and subjected to the action of the
cylinder c (Fig 3).
The instrument was finally arranged for experiment as in
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 Volume 1  |
 24 Feb. 1876
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 Page 31 
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