33° Mr. Vulliamy's Account of the Means 
five different ways at pleasure, with the power of being able to 
set any of these pipes dry at will, in order to repair them when- 
ever occasion should require. The water being now entirely at 
command, I again resolved upon taking out more sand, in order 
to try what additional quantity of water could be obtained 
thereby. I cannot exactly ascertain the quantity of sand taken 
out, but the increase of water obtained was very great ; as in- 
stead of the well discharging thirty gallons in a minute, the 
water was now increased to forty-six gallons in the same 
time. 
If you think, Sir, that the above account of an overflowing 
well, the joint production of nature and art, is deserving your 
attention, I feel myself much gratified in the pleasure I have in 
giving you this description of it; and have the honour of being, 
with the greatest regard, Sir, &c. 
B. VULLIAMY 
EXPLANATION OF THE PLATE. (Tab. VII.) 
Fig. l. 
a Top of the well, with the water running over. 
b b Ground line. 
c Sand lying in the well. 
d Copper pipe. 
ffffff Steining of the well. 
g g Double steining six feet from the bottom upwards. 
h Stratum which the end of the copper pipe was driven into. 
