28 
Colonel Lambton’s corrections applied 
what is now the parliamentary standard ; and the degree de- 
pending on Ramsden’s bar, must be multiplied by ,00007, 
and the product added to the measure given by the bar, to 
reduce it to the standard measure. 
Now the arc which I have measured depends on both 
these standards, as I had a new chain sent out by Mr. Berge 
in 1802, which was laid off from Ramsden’s bar at the tem- 
perature of 52 0 ; and this chain has never been used as a mea- 
suring chain, but as a standard chain with which to compare 
the other, till after the base near Gooty was measured, when 
the irregularity in the wear of the measuring chain was first 
discovered ; for then the brass standard scale was had re- 
course to, and a correction applied to the base ; and the tri- 
angles computed back to Yerracondah, one of the meridional 
stations about half way between the base near Bangalore 
and that near Gooty : and this is the correction alluded to in 
page 487 in the second part of the Philosophical Transactions 
for 1818. It thence follows, that the meridional distance 
from Yerracondah to Daumergidda depends on the brass 
standard scale ; and that the meridional distance from Yerra- 
condah to Punnae, near Cape Comorin, depends on the stand- 
ard chain. 
I shall now proceed to give the different sections of the 
arc, correcting them by the above factors as I go along. 
From Namthabad back to Yerracondah, by the Feet. 
base, as measured in 1811. - 429120,6 s. 
The same distance by the corrected base, is - 429134,3 s. 
Hence, from Namthabad to Yerracondah, de- 
pending on the standard scale, is - - 429134,3 s. 
From Yerracondah to Dodagoontah, depending 
on the standard chain, is 332662,3 sv 
