nDiagometerA sort of electroscope, invented by Rousseau, in which the dry pile is employed to measure the amount of electricity transmitted by different bodies, or to determine their conducting power.
Century Dictionary and Cyclopedia
ndiagometerA kind of electroscope, consisting of a dry pile and a magnetized needle for an indicator, used for ascertaining the conducting power of different bodies. It was first employed by Rousseau to detect adulterations in olive-oil, which is said to have less conducting power than other fixed oils.
Chambers's Twentieth Century Dictionary
nDiagometerdī-a-gom′e-tėr a form of electroscope for ascertaining conducting power.