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High voltage x-ray equipment, x-ray tube on right, Ruhmkorff high voltage coil on left
ARP23A15_260

High voltage x-ray equipment, x-ray tube on right,...

Dutch interior showing a family making music
ARP09A00_455

Dutch interior showing a family making music

Investigating atmospheric electricity in normal cloudy conditions
ARP07114_011084P

Investigating atmospheric electricity in normal cl...