Gunpowder Castillo de San Marcos National Monument ( National ...
Originally, gunpowder was made by mixing elemental sulfur, charcoal, and saltpeter (potassium nitrate). There was no definitive opinion as to what the ratios should be, and this changed dramatically from country to country and over time. The current modern ratio of 75% nitrate,15% charcoal, 10% sulfur was settled upon sometime in the mid 18th ...