‘frequency’ historical pictures (exact matches)

Active selection in cart:
Modern Wonders, 1938: A 500,000, Volt Flash
Modern Wonders, 1938: A 500,000, Volt Flash
This Mechanized Age, 1937: Electric Melting Furnace
This Mechanized Age, 1937: Electric Melting Furnace
Nikola Tesla, pioneer in experiments on high frequency oscillations
Nikola Tesla, pioneer in experiments on high frequency oscillations
Storm Tracks and Frequency
Storm Tracks and Frequency
'Jedi' helmet, used with Cryogenic Magnetic Resonance Imaging Machine
'Jedi' helmet, used with Cryogenic Magnetic Resonance Imaging Machine
Storm Tracks and Frequency, World
Storm Tracks and Frequency, World
Circuit diagram of d'Arsonval's high frequency apparatus
Circuit diagram of d'Arsonval's high frequency apparatus
High frequency oscillator, D'Arsonval & Riviere
High frequency oscillator, D'Arsonval & Riviere