Mining Safety Lamps: a Light in Dark Places
14:06
Wolf Flame Safety Lamp: Many Bright Ideas
14:57
Vibroplex: the Fastest Key in the West
12:23
Carbide Lamps: the Caver's Friend
7:37
1965: The EVOLUTION of Miners' SAFETY LAMPS | Tonight | World of Work | BBC Archive
28:48
Blasting Machines: Not Just for Wile E. Coyote
25:47
German WWII Mines: The Enemy Below
21:14
Geiger Counter: the Classic Radiation Detector
29:08