2 Mr. Limbird’s Account of the Strata 
being 2g inches in diameter within, half an inch thick, and upon 
an average 6 feet and i inch in length ; they were affixed together 
with boxes and fcrews, and with a piece of foft leather between 
the top of each box and fcrew, to prevent them from 
breaking ; the uppermoff pipe is fattened to a plank, which lies 
upon the top of the brick-work. 
At the diftance of 447 feet from the furface there is a bed. 
of dark- coloured earth mixed with chalk and gravel, which 
continues to the depth of 449 feet and 10 inches from the 
fhrface, where is a bed of dark-coloured earth without any 
chalk and with very little gravel, which continues to the 
depth of 454 feet and 7 inches from the furface; there it changes 
to a dark-coloured earth, mixed with chalk and gravel, which 
continues to the depth of 456 feet and 8 inches from the fur- 
face, and then changes to a dark-coloured earth without any 
chalk, and with very little gravel, which continues to the 
depth of 457 feet from the furface, and then changes of a 
lighter colour; and this continues to the depth of 462 feet 
and 4 inches from the furface, where it changes of a darker 
colour, and fo continues to the depth of 470 feet and 3 inches 
from the furface. Here the ground changes to a dark-coloured 
earth, mixed with chalk and gravel, which continues to the 
depth of 470 feet and 7 inches from the furface, where he came 
to a bed of ttone, like ragftone, about 13 inches thick, which 
ground into powder with the wimble, and mixed with the earth,. 
Under this bed of ftone there is a dark-coloured earth, without 
any chalk, and with but little gravel, which continues to the 
depth of 472 feet from the furface, when it changes fomething. 
lighter, and continues fo about 2 inches, where the earth ap- 
pear* to be mixed with chalk and gravel, and continues fo for 
about 
