80 



EIGHTH REPORT — 1838. 



>laceJ 

 ervtM 



Stonehouse. 



London. 



1838. 

 Sept. 1 



Dec. 4 



— 10 



h m 



2 45 p. M, 



4 15 p.m. 



10 45a.m. 



30 p.m. 



Noon 



2 P.M. 



Poles. 



u direct, 



/3 reversed. 



R 6 a 71 17-3 



/3 71 27-3 



a 71 25-5 



/3 71 26-4 



R 4 



R 4 



R 5 



R 6 



R 7 



* 69 19-3 



/3 69 11-7 



a 69 8-3 



/3 69 17-4 



«. 69 12-3 



H 69 19-6 



a 69 13-9 



j3 69 14-9 



71 22-3 



71 25-9 



69 15-4 



69 12-8 



69 15-9 



69 14-4 



Corrected 

 Dip. 



Mean Dip. 



} 



71 241 



69 14-67 



In the gro 

 pf Stoneb 

 theseatol 

 Sir Hew 

 rymple I 

 K.C.B. 



Westboun 

 Green, 

 row Ro« 



Table XVI. contains the latitudes and longitudes of Captain 

 Ross's stations, with the mean dip at each station reduced to the 

 1st January, 18.38, being the middle period of his observations. 



Table XVI. 



I-^g- IJanll'a 



Berwick ... 

 Stonehouse . 

 Douglas ... 

 Newcastle . . . 



York 



Scarborough 

 Bridlington . 

 Birkenhead . 

 Pwllheli ... 

 Wadworth... 



Louth 



Nottingham 



Stafford 



Birmingham 

 Pembroke... 



Cromer 



Swansea ... 

 Daventry ... 



55 45 

 54 55 

 54 10 

 54 58 



53 57 



54 18 

 54 08 

 53 24 



52 55 



53 28 

 53 19 

 52 57 

 52 48 

 52 28 



51 39 



52 56 



51 36 



52 16 



2 00 

 2 44 

 4 28 

 1 36 

 1 06 

 26 

 14 



1 08 



71 43-6 

 71 25-7 

 71 19-6 

 71 14-6 

 70 460 

 70 43-8 

 70 39-6 

 70 35-1 

 70 320 

 70 26-6 

 70 18-6 

 70 15-4 

 70 090 

 69 59-7 

 69 55-5 

 69 47-0 

 69 46-3 

 69 40-3 



Ilfracombe ... 



Clifton 



Lowestoffe .., 

 Marlborough , 



Padstow 



Bushy 



Land's End.., 



Exeter 



Harwich 



Falmouth ... 



London 



Salisbury 



Weymouth .., 

 Plymouth ... 

 Guildford ... 



Southsea 



Margate 



Tortington ... 



If we combine the results at these thirty- six stations by the 

 method of least squares, we obtain the following values : 

 a:= + -1974; ?/=--5114; i« = — 68°54'; r = 0'-548; and 

 8=69° 53'"4 at the mean geographical position of 52" 16' N., 

 and 1° 55' W. 



Major Sahine's Observations. — These observations were 

 made at fifteen stations, with a 9-^-inch circle, and two needles 

 by Gambey, (Table XVII.); and at twelve stations with a circle 

 of Nairne and Blunt of 11 inches in diameter, and a needle by 

 Robinson, designated as S 2, (Table XVIII.) 



