[ +15 ] 
not fo good as I wi(hed, but much better than a Had- 
ley’s quadrant, as we found by experience, and the 
beft we could procure in time for our purpofe. It 
was a theodolite, with telefcopic fights, in which 
there were crofs hairs ; it had a fpirit level to adjull: 
the plain of the inftrument horizontally j and alfo 
one applied to the telefcope parallel with its axis, and, 
at right angles to the other fpirit level. By means of 
thefe two levels and adjufting fcrews, we found we 
could adjufl it very nearly, the inftrument being a 
very good one of the kind. With this we fet our 
clock, by taking equal altitudes of the Sun, which we 
corrected by the tables publifhed in a pamphlet, in- 
titled, Inftrudtions relative to the enfuing Tranfit 
of Venus, 6cc, by the Rev. Mr. Nevil Mafkelyne. 
The 27th, we got fome good correfponding altitudes 
of the Sun, by which we fet our clock j and took 
equal altitudes of fome of the fixed ftars, to prove 
the rate of our clock. After this it continued cloudy, 
with rain at times, and a high wind at north-eaft, till 
the 31ft, when the clouds broke a little. During 
this time, we employed ourfelves in meafuring the 
diftance of our place of obfervation from the ftone 
fixed at the beginning, or eaft end, of the eaft and 
weft line, which is the boundary between the three 
lower counties and Maryland, and is fituate on Fen- 
wick’s Ifland'; the latitude and longitude of this 
place being accurately determined by Mefiieurs Dixon 
and Mafon. 
The meridional difference of the latitude of the 
place of our obfervation, north from Fenwick’s Ifland, 
at the beginning of the eaft and weft line, as before 
deferibed, being the eafternmoft end of the foutherni 
boundary 
