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XVI. An Account of the Measurement of an Arc of the Meridian , 
extending from Dunnose, in the Isle of Wight, Latitude 
5 o° 37' 8", to Clifton , in Yorkshire , Latitude 53 0 2 7' 31", w 
cowra of the Operations carried on for the Trigonometrical 
Survey of England, in the Years 1800, 1801, and 1802* By 
Major William Mudge, of the Royal Artillery, F.R.S . 
Read June 23, 1803. 
SECTION FIRST. 
In the last account presented to the Royal Society, I expressed 
my intentions of making the operations which were to follow that 
period, subservient to the purpose of measuring a portion of the 
meridional arc, running from Dunnose, in the Isle of Wight, 
into the northern part of Yorkshire. In the account referred to, 
(See Phil. Trans, for 1800, page 565,) I stated my reasons 
for adopting that resolution, and my hopes that Mr. Ramsden 
would shortly finish the zenith sector which his Grace the Duke 
of Richmond had bespoken of him, when Master General of the 
Ordnance. As that celebrated artist, from the beginning of the 
year 1800 till the middle of the following summer, had pro- 
ceeded with little interruption, except from illness, towards its 
completion, the whole was brought so near to a conclusion 
before he died, that Mr. Berge found no difficulty in rendering 
it sufficiently perfect. 
It is proper I should state, more fully than I have formerly 
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