This paper describes a system of redundant counting circuitry which has been used for about two years in carbon‐14 dating. The use of this circuitry enables the operator to know when a measured counting rate is unreliable because of electronic trouble, either steady or intermittent. It also enables him to continue taking reliable data despite most intermittent troubles and aids in locating them.

Topics
Radiocarbon dating
1.
W. H.
Burke
 and
W. G.
Meinschein
,
Rev. Sci. Instr.
26
,
1137
(
1955
).
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2.
Plug‐in units by Vector Electronics Company, Type C‐10‐OP.
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© 1959 The American Institute of Physics.
1959
The American Institute of Physics
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