Electrostatics, Energy and power measurement
Counter Continuous current counter Electroctatic machine De Carré Electrostatic machine Wimshurst Watímetre 25 A 300 V Siemens & Halske
Radiometric Wattmeter 220 V 2,5 – 5 A Wattmeter Trüb – Täuber 30 – 60-120 – 300 – 600 V Wattmeter Weston 300 V – 10 A Wattmeter Weston 330 V 5 A