1) Russian invention
Found on
https://www.crosswordclues.com/clue/pyrocollodion
Pyrocollodion is a smokeless powder invented by Dmitri Mendeleev. Mendeleev discovered it in 1892 and proposed to use it to replace gunpowder in the Russian Navy. This offer was rejected because of cost and efficiency. Pyrocollodion is known to be spontaneously combustible, and explosive. When ignited, it will burn/explode quickly, and with excess...
Found on
http://en.wikipedia.org/wiki/Pyrocollodion
No exact match found.
