In the Physical Review for June, 1912, the author discusses the theory of an electrical method for measuring small intervals of time. Time is measured in terms of the throw of a ballistic galvanometer, which is in the circuit of a Wheatstone's bridge during the interval.
Proceedings of the Iowa Academy of Science
©1912 Iowa Academy of Science, Inc.
Brown, F. C.
"A New Apparatus for Measuring Small Intervals of Time Independent of Clock or Chronograph,"
Proceedings of the Iowa Academy of Science, 19(1), 185-188.
Available at: https://scholarworks.uni.edu/pias/vol19/iss1/33