Before creating
the 5 weights, The ancients had to create a 1 gram weight to measure out all their other weights.
So the ancients had a bunch of super fine sand which was made entirely of the same material, and every grain was its most basic material. They had 121 grams of this sand. They also had a tube which could hold exactly 121 grams of sand, no more, no less.
How do the ancients weigh out 1 gram of sand?
since there is no precendent set for the weight of one gram, the ancients could simply portion whatever amount of sand they thought might provide a convenient measure, and call it "one gram". Then they'd have to lock it away in a safe in a foreign country to guarantee its longevity for comparitive measurement purposes...
my solution
