DEGREE, 
Taste, containing the Latitudes of the one 3 and their 
Lorgitudes from Green 
Lat. Long. | In Time. 
Wet. 
: G ! L ie) ‘ow 8 
Greenwich ob. - 51 28 40 
[Norwood - - 51 24378 ,9 § 3/0 202 
Hundred-acres 51 20 174 | O IT 20) 0 45.3 
Hanger-h lt 51 31 234,017 48) r 11.2 
Ha mpton Poor- honk 51 25 354 | O 27 491 1 27.1 
King’ g-arbou 5t 23 47% | O 26 gol r 47 3 
St. Ann’s-nill 5123 5th 10 3 17) 2 5.2 
aft, 
Borley-hiil - 5116 413 |0 0 310 02 
|S:verndroog-caftle on 
Shooter’s-hill - 5128 0 | 90 3a4tto 47 
Prant-tteeple - Sl 5 54+ | O16 7314 4.9 
Wrotham-hil 518 54 |.0 18 45] x 15.1 
Goudhurit-feeple 51 6 4g4 | 0 27 4c] 1 50.7 
Fairlight-dowa SI 52 39 lo 37 2 28.5 
Hollingborn-hit} Sr 15 53% | © 39 28] 2 37.9 
Tenterden-fleeple 5t 4 8 | 0 41 I1l 2 44.8 
Ruckinge 5 355 | O 53 16) 2 33.1 
Lydd-tteeple 5° 57 7% | ° 54+ 19) 3 37-9 
Allingzton-knol 5r 4 46 | 0 57 13) 3 45.9 
ae oe “rook, near Dyn 
- I ririio 18} 3 57.2 
Pedlelwerth - s, 6 soll 1 4 g neue 
Swing feld-‘teeple 5r 8 48 Tri 18] 4 45.2 
Folkitone-turnpike 1 5 45% | « II 33] 4 46.2 
Dover-caftie, N. turret 
of the Kee Io97 473 }1 19 5 16.5 
On the Coafl of France. 
Montlambert near Bou- : 
ogne 50 43 I 3S 51] 6 35.2 
Blanenez - 5° 55 315 | I 42 24] 6 49.6 
N. D at Calais - 50 §7 305 | I 50 56] 7 23.7 
The refult, independent of theory, as far as relates to the 
immediate obje& of the undertaking, is, that the diftance 
etween the parallels of latitude of Greenwich and Paris is 
160 059 fathoms, or 963 -954 feet, which correfponds to an 
8° 26”, which 
it is not ore ea eemiave, The Fr ench 
culating from a ais hypothefis of the figure of the 
earth, make it g™ ’ of time. But colonel Mudge, by 
affuming a partial ie gout adapted to the intermediate 
country, and fuch as refults from actual meafurement, 
makcs the see hag of longitude 9™19”.4: the latter deter- 
mination certa appears to us to be far the moft 
bable ; the ee 1s, perhaps, between both. Dr.M 
from aflronomical obfervation, eftimates it g™ 
nearer than this it will probably never be known. 
Meafurement of a Degree perpendicular to the Meridian. 
The objeQ of Cafiini’s memoir, relative to the junction 
aftronomers, cale. 
. 
of Greenwich and Pari, being thns aceomplifhed, the aa 
Aaa arn of the furvey was fufpended for a long t! 
e death of general Roy; but the duke of Richuond, 
he n mafter of the ordnance, having, by an accidental cira 
cumitance, obtained from Ramfden a new theodolite of the 
fame dimentions as that above noticed, but with confider- 
able improvements, and two new fteel ‘herae, by the fame 
artift, his Grace availed himfelf of the influence his fitua- 
tion commanded, and procured the king’s permiffion for the 
recommencement of the furvey, which has fince been ex- 
On the 
k wa rufted to colonel Mudge, who had already 
diftinguifhed himfelf by his fuperior talents, and ae bas 
executed the arduous tafl committed $ char 
fied for Ly ee ide in 
a mathema- 
affifted by Mr. Dalby, a 
oh : 
e greater part of thefe saat we enna as quite 
foreign to our prefent fubje&; but two obje&s which im- 
mediately relate to it, have been accomplifhed in the courfe 
of this furvey, ‘Thefe are the dire&t meafurement of an arc 
of the meridian, and of a degree of a great circle perpendi= 
cular to it. 
The latter os-ration might be made the fubjeG of a fea 
parate article, but as it occurred firt in order of time, and 
as the two meafurements had the bafe and feveral triangles 
n common, we prefer making it the firft fubje& of our con« 
fideration. 
operations of 1791 began by a re-meafurement of the 
he 
bafe, with the fteel chains, and, as we have already ftated, a 
difference of only 23 inches was found between the two 
meafures 
w flatong were chofen to extend the furvey lap 
e Dunnofe and Beachy-head with the former 
eee “Th hefe ftations were ae ure the per- 
pendicular Taree as they were nearly eaft and weft of each 
other, and were ia favourable: weather reciprocally vifible, , 
though more than 60 miles diltant. Some of the fides of 
the former feries of triangles being common to the new, an 
C 
e of verification was meafured on Salifbary-plain, the 
length a which was reduced to the fame kcvel as that on 
One branch of thia 
the original bafe of departure 
; length deduced by caleulation did not differ aa inch from 
the ies mee ees 
other prin cipal branches of the triangle ferved to 
commen cer ofe and Beachy-head with the bafes, and with 
the former cae of general Roy. So that the diftance 
from Dunnofe to Beachy-lead was determined by four dif- 
ferent a yaaa and appeared to be as follows: 
339-3946 
339:395-0 oor 6 = diftance of Dunnofe and 
3399399-2 Beachy: head. 
8 
= tna angle at aan was found by obfervations 
e Pole Startobe  .- ‘ 56? 53” 
aad at Beachy- ead ~_ = - ma ‘ 5 . 
