The Mercurial Wand





Take a piece of stick, cut it even at each end with a penknife, and

immerse it in a vessel of mercury. When the air is pumped out of the

receiver, it will at the same time come out of the pores of the wood,

through the mercury, as will be visible at each end of the stick. When

the air is again let into the receiver, it falls on the surface of the

mercury, and forces it into the pores of the wood, to possess the

place of the air.



When the rod is taken out, it will be found considerably heavier than

before, and that it has changed its colour, being now all over of a

bluish hue. If cut transversely, the quicksilver will be seen to

glitter in every part of it.





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