Fire from ICE...
Native people of Alaska and Siberia have been forming lenses from ice for centuries, and using the lens to focus sun light well enough to start tender smoldering.
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There was something about using a piece of ice or snow for an incendiary device in the military, but I can't remember the exact details...
Wasn't in a book, I just heard one of the EOD guys talking about it once casually...
It's like taking an element, Phosphorous, Potassium, Sodium, or something like that and rolling it up in a snow ball or hollowing out a piece of well frozen ice and adding the element to that and plugging the hole.
Then you slide the contraption into a heated space, like bunker enemy tent, ect.
Takes a while for the ice/snow to melt, but when it becomes liquid water it will react with the elemental substance and start a raging fire that adding water to just makes it burn hotter and faster...
No reference, and may have been BS, but the EOD guy was from German and swore it would work...
Swore the Russians inflicted several casualties with this product during WW II by leaving these things in areas that would later be occupied by German forces and as soon as they started a fire....
Maybe some of our military information historians can shed some light on this...
I just don't have access to Russian military archives, nor do I particularly care to go routing around looking for the plans...