Date: 1820
Lastly, he added, that in a circular channel, concealed in the mounting was contained some running quick- silver ; that by shaking the phial irregularly, when the orifices osthe two cones met, this mer- cury insinuated itself in a greater or less quan- tity, and liquefied the amalgama ; that it came to pass sometimes, that by the variety of motions given to the machine, the mercury so introduced returned again by the same opening, and that then the amalgama ceased to be fluid.  I relate with all possible exactness what the possessor of this ingenious machine told me, and which I also  12 NAPLES.