FROM THE ORDNANCE TRIGONOMETRICAL SURVEY. 
619 
Indian Arc. — The data for the first Indian Arc are given in vol. viii. of the Asiatic 
Researches, page 137. 
French Arc. — The data for this arc will be found in the Base du Syst. Metr. ii. 
565, 615, and iii. 548, 549. 
Hanoverian Arc. — From Gauss’ Breitenunterscheid, &c., p. 71. 
Danish and Russian Arcs, as used by Bessel, Astronomische Nachrichten, No. 333. 
Prussian Arc. — Gradmessung in Ostpreussen : Bessel, 1838. 
Swedish Arc. — Exposition des Operations faites en Lapponie : Svanberg. 
1. Peruvian Arc. 
Latitude. 
Amplitude. 
Distance between 
the parallels. 
Tarqui 
-3 i 32-068 
toise. 
Cotchesqui 
+ 0 2 31-387 
3 7 3-455 
176875-5 
2. First East Indian Arc. 
Trivandeporum 
11 44 52-590 
feet. 
Pandree 
13 19 49-018 
1 34 56-428 
574327-9 
3. Second East Indian Arc. 
Punnae 
8 9 31-722 
feet. 
Damargida 
18 3 15-292 
9 53 43-570 
3591744-06 
Kalianpur 
24 7 11-262 
15 57 39-540 
5794648-82 
Kaliana 
29 30 48-322 
21 21 16-600 
7755786-84 
4. French Arc. 
Formentera 
38 .39 56-11 
toise. 
Mountjouy 
41 21 44-96 
2 41 48-85 
153673-61 
Barcelona 
41 22 47-90 
2 42 61-79 
154616-74 
Carcassonne 
43 12 54-30 
4 32 58-19 
259172-61 
Evaux 
46 10 42-54 
7 30 46-43 
428019-31 
Pantheon 
48 50 49-37 
10 10 53-26 
580312-41 
Dunkirk 
51 2 8-85 
12 22 12-74 
705257-21 
5. English Arc. 
Dunnose 
50 37 7-15 
feet. 
Southampton 
50 54 46-97 
0 17 39-82 
107807-19 
Greenwich 
51 28 38-30 
0 51 31-15 
313716-97 
Arbury Hill 
52 13 27-01 
1 36 19-86 
586356-34 
Clifton 
53 27 30-27 
2 50 23-12 
1036581-55 
Kellie Law 
56 14 51-43 
5 37 44-28 
2055737-20 
Great Stirling 
57 27 49-12 
6 50 41-97 
2499839-45 
Saxavord 
60 49 38-58 
10 12 31-43 
3729335-78 
6. Hanoverian Arc. 
Gottingen 
51 31 47-85 
toise 
Altona 
53 32 45-27 
2 0 57-42 
115163-725 
