Pattinson's works at Felling, about three
miles from Gateshead.
"Mr. Pattinson first caused a metal pot to be inserted in the ground
until its top was level with the surface; and having put into it 9
lbs. of nitrate of soda and 6 lbs. of sulphur, he ignited the mass;
and then, heating it to the highest possible degree of which it was
susceptible, he poured into it about a quart of water. The effect was
an immediate explosion (accompanied by a loud clap), which would have
been exceedingly perilous to any person in its immediate vicinity.
The experiment was next made under different conditions. The pot into
which the sulphur and nitrate of soda were put was covered over the
top with a large piece of thick metal of considerable weight; and
above that again were placed several large pieces of clay and earth.
It was deemed necessary to try this experiment in an open field, away
from any dwelling-house, and which admitted of the spectators placing
themselves at a safe distance from the spot. The materials were then
ignited as before; and when in the incandescent state, water was
poured upon the mass down a spout.
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