WILLIAM SMITH I HIS MAPS AND MEMOIRS 
191 
which gravel, between the clay and the face of the rock tapered down- 
ward ' to nothing ' in the bottom of the excavation. 
" About two yards within the edge of the rock (which was nearly 
as upright as the edge of a wall) a basin six feet in diameter and four 
feet deep was excavated, to receive the water flowing from the joints of 
the rock. Cast-iron pipes branching from the main line of pipes were 
laid up to this basin, to receive the regular flow of the spring, which 
before the end of summer was reduced to less than six hogshead per 
hour. The clay channel, in the bottom of which the pipes were laid, 
was refilled with clay and puddled, so that no water could pass from the 
rock but through the pipes. The end of the last pipe was closed, and 
a vertical aperture made for receiving the run of the spring. No 
further contrivance was required for stopping the water and damming 
it up in the rock, than an open vertical pipe, ground to fit tight into the 
aperture in the horizontal pipe, and this to a height of four feet was done 
by pieces of pipe, each a foot in length, tight-fitting one into another 
for the convenience of wholly or partially damming or drawing off 
the stored water as occasion might require ; the water being allowed to 
run in at the top of the pipe. 
" After the rainy days in the beginning of November last, these 
short pieces of pipe were put in one after another, and found to dam 
up the water in the joints of the rock to the height of four feet, which 
from the quantity wasted last summer during the progress of the works 
was calculated to contain 5,000 hogsheads. The vertical pipe being 
since closed at the top (and lately also the main iron pipe), the whole of 
the water from those parts becomes forced in to the cavities of the rock, 
and now stands 14 feet deep at the spring, or ten feet higher than we 
calculated upon penning it ; so that the subterraneous reservoir may 
contain 12,000 or 15,000 hogsheads of water. This will be ascertained 
in the summer as it is drawn down from time to time into the new arched 
reservoir in the town. This reservoir, formed of a brick cylinder 18 
feet deep, sunk in the ground, and covered by a dome 40 feet span and 
20 feet high, surrounded by a strong bank of earth, is calculated to 
contain 4,000 hogsheads." 
The paper is dated, " Scarborough, Feb. 5, 1827." 
NOTICES OF SMITH'S WORK. 
In addition to the remarks made by Phillips in his "Memoirs cf 
William Smith," referred to at the commencement of this paper, 
other references to Smith's work have been made. 
