196 Captain Clarke on the Figure of the Earth. 



feet — 45 feet and 10 feet, instead of a mile and three miles re- 

 spectively. This result is readily obtained from the formulae at 

 page 769 of the ' Account of the Principal Triangulation/ 



Alterations in the Semiaxes of the Earth (given at p. 771 of the 'Account 

 of the Principal Triangulation ') which would result from an alteration of 

 1" in the latitudes of the different Astronomical Stations. 



Anglo-Gallic Arc. 



Forraentera 



Montjouy 



Barcelona 



Carcassonne 



Pantheon 



Dunkirk 



St. Agnes 



Goonhilly 



Hensbarrow 



High Port Cliff 



Week Down 



Boniface Down 



Dunnose 



Black Down 



Southampton 



Greenwich Observatory. 



Precelly 



Cambridge Observatory. 



Arbury Hill 



Delamere 



Clifton Beacon .. 



South Berule 



Burleigh Moor .. 



Durham 



Ben Lomond 



Kellie Law 



Ben Heynish 



Great Stirling 



Monach 



Ben Hutig 



North Rona 



Balta 



Gerth of Scaw .. 

 Saxaford 



Danish Arc. 



Lauenberg 



Lysabbel 



da. 



5b. 



feet. 



feet. 



-33-9 

 -291 

 -291 

 -25-4 

 -11-8 



- 5-6 



- 9-0 



- 8-5 



- 7 5 



- 6-9 



- 69 



-42-4 

 -301 

 -301 

 -22-6 



- 4-6 

 4- 0-5 



- 2 



- 17 



- 0-9 



- 4 



- 0-4 



- 6-9 



- 0-4 



- 6-9 



- 0-4 



- 6-7 



- 0-2 



- 60 



4- 0-2 



- 4-3 



+ 1-4 



- 2-9 



+ 2-3 



- 21 



4- 2-8 



- 2 1 



4- 2-8 



4- 11 



4- 4-5 



4- 1-8 



4- 4-9 



+ 40 



4- 5-9 



4- 54 



4- 6-5 



+ 6-1 



4- 6-8 



4-10-9 



4- 8-4 



4-111 



4- 8-4 



4-119 



4- 8-6 



4-15-5 



4- 9-5 



4-187 



4-10-0 



4-19-5 



4-10-1 



4-21 6 



4-10-4 



4-279 



4-10-8 



4-28-1 



4-10-8 



4-28-2 



4-10-8 



- 11 



- 2 



4- 11 



4- 2-0 



Russian Arc. 

 Staro-Nekrassowka 



Wodolui 



Ssuprunkowzi 



Kremenetz 



Belin 



Nemesch 



Jacobstadt 



Dorpat .„ 



Hogland 



Kilpi-Maki 



Tornea 



Stuor-Oivi 



Fuglenaes 



ca. 



Indian Arc, II. 



Punnae 



Putchapalliam 

 Dodagoontah . 

 Namthabad.... 

 Damergida .... 

 Takal Khera . 



Kalianpur 



Kaliana 



Indian Arc, I. 



Trivandeporum 

 Pandree 



Prussian Arc. 



Truntz 



Konigsberg 



Memel 



Peruvian Arc. 



Tarqui 



Cotchesqui 



Hanoverian Arc. 



Gottingen 



Altona 



feet. 

 -375 

 -34-4 

 -28-9 

 -25-2 



— 19-4 

 -111 



- 4-8 

 + 20 

 4- 8-5 

 4-186 

 4-321 

 4-449 

 +54-2 



cb. 



31 

 1-3 

 0-2 

 06 

 1-5 

 1-9 

 1-5 

 10 



0-4 

 0-4 



- 2 2 



- 0-6 



4- 2-8 



+ 



12 



1-2 



30 

 4- 30 



feet. 

 -177 

 -12 4 



- 7 5 



- 4 3 



- 2 



4- 3 9 

 + 60 

 4- 7-4 



4- 8-0 

 + 7-8 

 4- 6-0 

 4- 2-9 

 00 



-82-9 

 -560 

 -37-4 

 -18-4 

 4- 7-7 

 4-33-3 

 4-57-3 

 4-96-3 



- 7-3 



4- 7-3 



- 0-8 



- 0-2 

 4- 1-0 



-15-3 



4-15-3 



- 1-9 

 4- 1-9 



In conclusion, the elements of the figure of the earth deduced 

 by Archdeacon Pratt are, although they happen to be near the 

 truth, arbitrary results, founded on an incorrect calculation, and 

 cannot be taken to supersede the results derived from the me- 

 thod of least squares, in which the deflections at every station, 

 without partiality, are fully taken into account and their most 

 probable values exhibited. 

 Southampton, February 9, 1866. 



