Before the invention of the x-ray, patients relied on the doctor’s medical examination and educated guess to find the location of bullets or broken bones. Wilhelm Conrad Roentgen took a tube similar to a florescent light bulb, removed all the air and filled it with special gas. When he passed a high electric voltage through it, the tube gave off a florescent glow. Thus, the x-ray was developed and medial diagnoses’ were made more accurately.
