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... edly as he explained,"The compost we acquired from the farmers was just enough to saturate the nitrate, dissolving the salts. The next process involved mixing it with potassium carbonate from wood ash. After boiling and cooling a few batches, the potassium nitrate crystallized. We ground each component into a fine powder—75% potassium nitrate, 15% charcoal, and 10% sulfur. We thought we had it."
Karl leaned back, one brow raised. "The burn was too slow."
The skeleton froze. "...E ...
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