the Trigonometrical Operation . 
261 
Computed latitudes and Ion 
the at 
Places. 
gitudes of d 
)Ove table. 
Latitudes. 
)me of the places in 
Longitude from Greenwich 
in degr. &c. 
in time. 
St. Paul’s 
Highbury Houfe, Tranfit-room 
St. James’s Church 
Argyll Street Gblervatory 
Clapham Common, Tranfit-room 
Richmond Royal Obfervatory 
0 / // 
51 30 49.43 
S l 33 I2 - 8 
5 1 3 ° 3°-7 
5 1 3 ° 53-°5 
51 27 12.7 
51 28 7.9 
O, S /> 
0 5 40 8 
0 S 30-5 
O 8 3 
0 8 18.36 
0 8 ?g .2 
0 18 42.3 
h m fee. 
O 0 23.12 
0 0 2 3 37 
0 0 3 2 *33 
0 0 33.224 
O O 54.6 ! 3 
O 1 14.82 
CONCLUSION. 
IN the courfe of this Paper, an account has been given of 
the commencement, progrefs, and completion of an operation, 
the firft of its kind in this country, undertaken by the com- 
mand, and executed under the aufpices, of a mod: gracious and 
beneficent Sovereign, the Patron of the Sciences. 
From a liberal fupply of much better indruments than ever 
were ufed for purpofes of this fort on any former occafion, and 
every other adidance that could contribute towards fuccefs, the 
operation has undoubtedly derived fome peculiar advantages : 
for, befides a more accurate mode of meafuring the bafes than 
has heretofore been pradtifed, the angles of the triangles have 
been obferved fo truly, that the relative geodetical fituations 
of the dations, as determined by plane trigonometrical com- 
putation, may be faid to be free from fenfible error. 
The indrument too, by means of its tranfit telefcope, being 
admirably calculated for determining, with great precilion, the 
true direction of the meridians, their convergence to each 
other, and confequently the differences of longitude, have 
2 thereby 
