Note 8 — XV
Reading edition
In only one out of several experiments made in the Berlin Mining College did gold-sand contain 0.014 gold; and, in one experiment on the heavy sand remaining on a mud-board, no gold was found.
Reading edition
In only one out of several experiments made in the Berlin Mining College did gold-sand contain 0.014 gold; and, in one experiment on the heavy sand remaining on a mud-board, no gold was found.