They use rods with hollowed ends containing within the cavities gold or silver filings, and stopped up with sawdust of the same wooden. It is true that they say that this last performer operated on knives that had been given him, and which he gave again after a time with the ends of the blades silvered. Taking them back, he slyly substituted his ready pieces for them; mounted these in his glasses, poured in as much of his elixir as suited him, and withdrew them on the lapse of the designated in...