Joe, it is milligrams. If you wish, you may correct the other post or give me the URL so that I can correct it.
The values run from 1 - 100 mg/mole of Silver, commonly 10 - 100 mg/mole and this is expressed as mg of Sodium Thiosulfate Pentahydrate. The ratio with gold is 1 part of Gold to 3 parts of Sulfur.
Thanks for the catch.