Signedon bulb: GE
Inscribedon bulb: COOLIDGE X-RAY TUBE
FunctionStandard early Coolidge tube. The heated cathode emits electrons that are accelerated by a high voltage and strike a metallic target in the middle of the bulb to produce the x-rays. This unit has a very large bulb to dissipate the heat and has a relatively fine focus.
ProvenanceFrom the Harvard Medical School.