46 



THE VOYAGE OF H.M.S. CHALLENGER. 



5. Santa Cruz, 



f Lat, 

 ( Lonj; 



28° 28' 30" n. 

 16 14 40 w. 



On a bridge on the main road : surrounding country level. The 

 stones about the spot were of lava, some of them magnetic, but on the 

 whole there was little disturbance. 



6. St Thomas Island, 



J Lat. 18°20'n. 

 \ Long. 64 55 w. 



On the north, side of Careen hill, under a tree 10 yards from the 

 beach, and just opposite Water Island. No local disturbance. 



Besides this station one observation was taken on Rupert rock for 

 Inclination, and one for Declination. At the remaining four stations 

 the Declination alone was observed. These show signs of local dis- 

 turbance. 



7. Bermuda, 



On account of the discordant results obtained in these islands 

 observations were made at nine different stations. It was found that 

 all the magnetic elements varied exceedingly in a short distance. 



The Inclination at the Cricket Ground, Somerset island, was 

 65° 44' n., whilst at Mount Langton, in the same latitude, and only 4 

 miles to the eastward, it was 67° 30' n. There was also a difference of 

 3° 45' in the Declination between the same places. 



( Lat. 32° 19' 12" n. 

 [Long. 64 51 48 w. 



On the green outside the dockyard, near a large blue stone opposite 

 Mitchell's store. This spot has alone been specially described, as here 

 the best value of the Declination was obtained. 



8. Halifax, N. S., 



f Lat. 44° 39' 48" n. 

 (Long. 63 35 12 w. 



On the drill ground in the dockyard, a grassy spot 50 paces w. by s. 

 from Observatory hill. The weather was unfavourable for making 

 good observations. On the morning, after a brilliant display of aurora 

 the Declination observed was 50' less than that of two days before ; in 

 the afternoon it had returned to its former amount, 21° 40' w. 



9. St Michael, Azores, 



| Lat. 37° 45' 18" n. 

 [ Long. 25 40 30 w. 



On a lawn in the garden of Senhor Jose de Canto. 



10. St Vincent, Cape de 

 Verdis Islands, 



J" Lat. 16° 52' 30" n. 

 ( Long. 25 w. 



On the beach to the west of the town, 100 yards s. 35° w. of the 

 monument to Mrs Hope (and a little to the wsstward of a small hill 



