la tin tube that is larger at one end than it !■
ber, and in which there are several holea Fill thii
rith powdered resin; and when it is shook over the
of a torch, the reflection will produce the exact ap>



f lightning.
ABTIFICIAL THUNDER.
1^1
tdraobms of the filings of iron, with one onnee of
led spirit of vitriol, in a strong bottle that holds
||n*ri>r of a pint ; slop it close, and in a few min-
^P Iba bottle ; then taking out the cork, put a light-
Vnear its mouth, which should be a little inclined,
It nill 80DU observe an illnminstion arise from the
Dded with a. loud explosion,
I againat the danger of the bottle bursting, the
ould be to bur; it in the ground, and apply tha
I aiODlli by means of a taper fastened to the end



elBIKBT OF ABTI.
m



This exhibition cm only be atiown at cundle light;
ini Ibere is another way, by fixing email piecee of gold ofT
he building instead of drilling the holes, which gives
lometbiDg of the appearance of illnminadoD, bnt by no
UekDS eqnal to the loregoing experiment.
N. B — It would be an improvement, if paper of various
loloors, rendered transparent by oil, were placed between
lightB behind, and the apertare in the buildings, as they
iroald then resemble lamps of different colours.
ABTIFICIAL EABTHQUAKE AND VOLCANO.
