Originally Posted by DemostiX
I wonder where 3 for 17 (grams) came from?!!
For calibration and mnemonic reasons combined, maybe the best calibration unit for central North Americans is a stack of US 5 cent coins, the nickel: For a long time the standard weight has been 5.00 grams.
Nickel = 5.00 grams.
I'll answer my own question, and so offer another useful memory device for central North Americans, the one around nickels being close to foreign:
Five modern quarters, such as the ones Grizz used to check the bias of his scale, weigh so close to 1.00 ounces as to be good enough for all weight-weenies. Folks here with iPad-equivalents in their hammocks at home might confirm that this is why the new weight standard for U$ quarters was set as it was.