What is a "bit of earth that is not salty"?

No clue…but check out this

interesting.. but not sure how it’s related?

@LocoLuke Salt is alkaline….the worlds most acidic lake?? Acid??? Complete opposite of salt????

Your Q asked “What is a “bit of earth that is not salty”?”

aaaah. that makes sense.
so any mineral that is naturally acidic would qualify as “earth that is not salty”

Isn’t sweet the opposite of salty?

Salts in general are neither acidic nor alkaline. Only when they are dissolved in water do they become acids or bases. I’m not sure what the pH of a sodium chloride solution is, that would determine whether it is acid or alkaline.
Of course, it’s unlikely that an alchemy text would mean “salt” in the same way that chemistry does. For that matter, “earth” is referred-to in alchemy as a “substance”, although it appears that alchemists were fond of allegory and deliberate obfuscation so that it’s hard to be sure what any alchemical terms actually mean.

@Cruiser that is an awesome article, thanks for posting it!

The alchemist Johann Becher claimed that only three alchemical essences formed matter: The salty earth, the sulfur earth, and the mercurial earth. source

I’m not sure I know much about this but I can recommend a book that you might fancy. The book is called “The Alchemist.”