Ayrton and others, for measuring voltages from 10,000 volts down to 1 volt.
Later excavations have been recorded by Ayrton, Abydos, iii.; Maclver, El Amrah and Abydos; and Garstang, El Arabah.
His wife, Mrs Hertha Ayrton, whom he married in 1885, assisted him in his researches, and became known for her scientific work on the electric arc and other subjects.
Guided by these experiments, Ayrton, Perry and Sumpner constructed an improved unifilar quadrant electrometer which was not only more sensitive than the White pattern, but fulfilled the theoretical law of working.