NH4NO2 is the little sun?

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There is one/two salt(s) in dew. One is NH4NO2 and other NH4NO3.
Some people claim that NH4NO2 is a “little sun” (a kind of igneous salt) and a powerful solvent. This salt must be removed from dew by a soft distillation. Not over 60 º C. or becomes NH4NO3.
The "Journal des savants" says: “this solar salt, due reduced to liquor becomes the Alkahest, as sought by the masters of art”.