 |
Electromagnetic tuning fork (Melde's device) |
 |
Electromagnetic tuning fork (Melde’s apparatus) |
 |
Electromagnet’s support stand |
 |
Electrometer |
 |
Electron Paramagnetic resonance EPR |
 |
Electroscope |
 ,  |
Electroscope |
 |
Electroscope |
 |
Electroscope |
 |
Electroscope, "Pith ball" |
