Instrument used mainly in education, produced by the publishing house G.B. Paravia in Turin. It was used to study the radiant matter. The tube owes his name to the inventor, the British physicist Sir William Crookes. It is composed by a spherical glass bulb, having two cylindrical protuberances which constitute the two exlectrodes of the device. The tube has a wooden circular base.
You are all set!
Your first Culture Weekly will arrive this week.