Thomas B. Greenslade, Jr. - Professor Emeritus of Physics - Kenyon College, Gambier, Ohio
Historical Electricity Teaching Instruments
Electrical Measurements, Electric Motors, Electricity, Static Electricity.

Physics apparatus often goes by various names. The interrupter, the electrotome and the repeater are all the same instrument. Some apparatus has a person's name attached to it: Matteucci's apparatus or Wheatstone's bridge. Other apparatus isn't used any more: Packard's apparatus or the piezeometer.