i. For the account of the Measurement of the base of verification in Romney marsh with the Steel Chain, in, the Matufn of 118 7 
E93 =©■ 
Philos. Trans. Vo/.LXXX. Tah.V. p 2 -j 2 
Arrangement of tlie Polls for eaclr Space of 100 Yards, or Length of 3 Chains . 

I 
Elevation of the Coffering for each. Chain. 
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flan of the Coffering; for each Chain. 
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Plan Sc Section of tlie Apparatus for the Extremities of the Chain; ScalcF/fart f the real dimensions. 
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— 
i A Single Eu/l \ 
Scale of Inches Jhr the Thin iiSectlifi,. 
1{< S <> 1 * a as 6 7 8 0 10 11 2^ 
lteai -End . 
General Section of the Hale. 
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ffiffh Nook Pipe 
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Dravviiig.-Polt . 
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