You now might use saltpeter if you want an old stump in your yard to decompose faster, but for a millennium it was the cause of wars, massacres, and great grassroots scientific efforts. It changed the ...
Saltpeter is a mineral that was used as a material for gunpowder in Japan in the Edo period and Europe in the Middle Ages. Saltpeter has the property of `` causing an endothermic reaction when put in ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback