One of the mysteries of the English language finally explained.
A photocell in the form of an electron tube with a photoemissive cathode.
- ‘Firefly flash and locomotion were observed using IR illumination that did not effect the phototube.’
- ‘Aliquots of 2 mL of the virus-photoproducts solution were placed in quartz phototubes, capped, and bubbled with oxygen for 5 min before being irradiated.’
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