“To demonstrate this simultaneity is by no means trivial, because it may for example happen that the product nucleus always forms in an activated state at first.”
Other Walther Bothe Quotes
Strict conservation of energy in the elementary process had thus been confirmed also by a negative experiment.
Walther Bothe 
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The Laboratory for Radioactivity consisted of only two rooms at the time; at a later date, when tests of radioactive substances became more extensive, it expanded into four rooms.
Walther Bothe
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Rossi was the first to describe another system working with valves in parallel; it has the advantage that it can easily be extended to coincidences between more than two events, and is therefore predominantly used today.
Walther Bothe
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