2 Kings 20:11

Viewing the King James Version. Click to switch to 1611 King James Version of 2 Kings 20:11.

And Isaiah the prophet cried unto the LORD: and he brought the shadow ten degrees backward, by which it had gone down in the dial of Ahaz.

Radium dials are watch, clock and other instrument dials painted with radioluminescent paint containing radium. The 1900s were the peak of radium dial production, as radiation poisoning was then unknown; subsequently, radium dials have largely been replaced by phosphorescent- or occasionally tritium-based light sources.