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are foon to be covered in the fame manner. They 
hand parallel to each other at about 57 feet diflance, 
and are founded on a chalk rock, about 100 feet 
from the river, which rifes in high tides within a 
few inches of the level of the ground, its brackifh 
water alfo foaking through to the wells that are dug 
near to the buildings. 
The barrels of powder, when the magazines are 
full, lie piled on each other up to the fpring of the 
arches ; and there are four copper hoops on each 
barrel, which, with a number of perpendicular iron 
bars, (that came down through the arches, to fup- 
port a long grooved piece of timber, wherein the 
crane was ufually moved and guided to any part 
where it was wanted) formed broken conductors 
within the building, the more dangerous from their 
being incompleat, as the explofion from hoop to 
hoop, in the paffage of lightning drawn down 
through the bars among the barrels, might eafily 
happen to fire the powder contained in them. But 
the workmen were removing all thofe iron bars (by 
the advice of fome members of this Society, who had 
been previoufly confulted) ; a meafure we very much 
approve of. 
On an elevated ground, nearly equal in height 
with the tops of the magazines, and 150 yards from 
them, is the houfe where the Board ufually meet. 
It is a lofty building, with a pointed hip-roof, the 
copings of lead down to the gutters, from which 
leaden pipes defeend at each end of the building into 
the water of wells of 40 feet deep, for the purpofe 
of conveying water forced up by engines to a ciftern 
