DEGREE, 
Bearings of the fame one ie if om the Obfervations made 
f wt 
Socal and Heatherfedge 6: 5t 50 «(8.W, 
Heatherfedge and Orpi - 82619 5.E, 
rpit and Bardon-hil 36 «SLE. 
Bardon-hill aftd Arbury-hill Fi 43 26 SE, 
Arbury-hill and Bri o «66. 
Brill and White-horfe-hiil - ms 5 48 S.W. 
White-horfe-hill and Highclere is 6 S.E, 
Highclere and Butfer-hill - 0 49 «CSE. 
Butfer-hill and Dunnofe - Hy 58 9 SW. 
Thefe bearings and fides give the following parallels to 
the meridian of Clifton 
Beacon hill and Heatherfedge = — 43,490.4 
ata i a Orp ~  101,202.6 
Orpit a - 126,561.3 
ee ‘hil nd “Aubory hil - - - 178,993.2 
Arbury-hill and Brill -  143,047-4 
Brill and V Nieeboreail - 93s717-6 
White-horfe-hill and Highclere = 90,03 1.4 
Highclere and Butfer-h ~ 22,219.83 
Burfer hil and- Dunnofe - =  -131,270.2 
The fum 1,936.33.39 feet, 
is the diflance between Dunnofe and the perpendicular to 
the meridian of Clifton; or the — of the arc itfelf. 
There is therefore a aaiipae of only half a foot between 
the two refults. may coat aueatly take 1,036,334 for 
the ee require 
tenfes in the es of the different parts of the 
etal arc are as folio 
o Uf ” 
1. Dunnofe and Clifton - - 50 23.38 
2. Dunsofe and Arbury-hill  - - I 36 19.98 
3. Arbury-hill and Clifton - 3-40 
4. Duanofe and-Greenwich - O 51 31.30 
. Greenwich and Clifton - E58 51-59 
6. Arbury-bill and Greeawich ° 44 48.19 
7. Dunnofe and Blenheim & I 13 49.69 
8, Blenheim and Clifton - > 1 37 3.6 
The following terreftrial arcs are thofe ufed in conjunc- 
tion with the preceding ones for computing the length of a 
degree : 
Are Feet. 
1. Dannofe and Clifton  - - 1,030,337 
2. Dunnofe and Arbury-hill - 86,3 
3. Arbury-hill and Clifton - - 450.017 
4. Dunnofe and Gr i - 343,096 
5. Greenwich and‘Chfton -~ = = 722,641 
é. Arbury-hill and oe = 292,024 
z Dunnofe and Blenhei - 446.498 
. Blenheim and Clifton - ° 589,839 
And by fimply dividing the terreftrial arcs by their cor- 
vefponding celeftial ones, and afterwards multiplying the fe- 
veral quotients _ 3600”, we thall get the length of the dee. 
grees as follow 
; athoms, 
Middle point between Dunnofe and Clifton €o;82 
Dunnofeand Arbury-hill 60,864 
ae ui and Clifton 60,766 
Dunnofe and rasa is 60,884 
reeuer and Clifto - 60,794 
rbury-hill and Gicaach a 
‘fathom 
Fathome, 
Middle point between Dien and Clifton 60,;76g. 
enheim and Dunnofe 60,890 
Taking sak eguats = _ wich a ° 28’ 40” from 
now given, the hoe a their middle 
and and, with the oe of the degrees, 
when eee arranged, will and as follov 
Lat. of middle Point. Fath. 
° / ” 
Arbury-hill and Clifton - 52 50 29.8—60,7€6 
' Blenheim and Clifton - 52 38 56.1—60,769 
Greenwich and Clifton ~ 52 28 §.5—60,794 
Dunnofe and Clifton - = 52 2 19.8—6o0,820 
Arbury-hill and Greenwich - S51 51 4.1—60,849 
Dunnofe and Arbur tri - 51 35 18.2—Co0,864 
Blenheim and Dunnof - 5f F3 18,2—60,899 
Dunnofe and Gece - 51 2 54.2—60,884, 
Colonel Mudge thus concludes his account of this operas. 
tion: 
this meafurement it rately that the length of a- 
fees on ade meridian, in latitude 2' 20", is 60,82¢ 
ms, This conclufion is soe Ae the fuppoficion 
of the whole are fubtending an angle of 2° go! 
the _ and a diltance of 1,036,337 face on the fiface 
of the € 
a The en of the degree at the _- point (51 ° 35) 18") . 
between the fouthern extremity of the and Arb ury-bill, 
is 60, 864 fathoms; which is greater an whe above, and eX». 
correct, and the eart 
an enelige form in thefe latitudes, either the arcs ae 
he deduétions are incorreét, or fome material deflection of 
the plumb-line has taken place, at one or two ftations, jon 
the effect of attraction. 
‘* Without arrogating to myfelf any merit from the pains 
taken in the performance of ne undertaking, I may fay, I 
am fo perfeétly convinced o general accuracy of the 
whole, that I cannot for a coat doubt the colleétive evie 
o feet, correfponding 
to 1” in the amplitude of the ie: arc, and J alfo think. 
it probable it cannot amount to half that quantity. The 
aa of the zenith diftances of the ftars being gene- 
rally erroneous, at any one ftation, cannot be admitted, un- 
tefl it fhould be imagined, that the plane of the feétor’s limb 
was not got into that of the meridian. Such an idea, how- 
ever, can {carcely be entertained, after a careful examination 
of the feveral obfervations, and a due attention to the means 
by which the i s made to affume its right pofi- 
tion. alfo, I fhould not fail to obferve, in this 
he azimuth circle,. 
, having two good chronometers in my poffeffion, I re- . 
ale verified is truth of the feGtor’s pofition, by ob- 
erving the tranfits of two ftars, north and fouth of the zee. 
nith, at the Abana diftances my arc would admit of. But, 
to return,.if ther an error in the amplitude of the total 
arc,. from a defleBion of the plumb-line. at either of the fta- 
tions, 
