The following chemicals, listed in order of preferred use, are
recommended for good results and less corrosion on the grounding system:
1. Magnesium sulphate (Epsom salts).
2. Copper sulphate (blue vitrol).
3. Calcium chloride.
4. Sodium chloride (common table salt).
5. Potassium nitrate (saltpeter).
From: Training Circular No. 11-6, HQ Department of the Army.
73 de N3UN Wayne.
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