526 GENERAL REMARKS. 
II. Dip. 
The following table exhibits the comparison of Captain Fitz- 
Roy’s observations of the dip in the southern hemisphere, with 
those of earlier observers, at stations where the materials for such 
a comparison exist. 
ASCENSION. 
Observer. Date. Variation, 
La Caille at W754 11, 10 N. 
Cook sei ase U7 cB. 57 WNG 
Dabine wes ewe Do22 = 4, SO .NE 
Duperrey sie LOZ) OT 56 IN, 
Fitz-Roy - »1886), 1 39 Ne 
St. HELENA. 
La Caille wat 75d, | (QL ano Se 
Cook siete ate Mey (Us (aS 
Fitz-Roy.. -. 1836 18. 01S. 
Carer oF Goop Hope: 
La Caille oem l75 li. 15. 600s. 
Bayley .- .. 1772 45. 37S. 
Bayley .- «. 1775 45. 198. 
Abercrombie .. 1775 46. 26S. 
Bayley ..) «. 1776 46. 31 S. 
Freycinet vey telor Occ ye 
Fitz-Roy -. 1836 52. 35S. 
Mauritius (Port Louvts). 
La Caille.. .. 1754 52. 17S. 
Duperrey es) 919245053. 51S. 
Fitz- Roy eeLoso! 54. OLS, 
OTAHEITE. 
Cook dh as. 2943" 3G.-49'S. 
Cook Sup eee (2774. 202 50,S. 
Bayleys) swe wien 2777 "20.147 8° 
Duperrey .-- 1823 30. 03S. 
Erman .. .. 1830 930. 209,5S. 
Fitz- Roy se, (LOS) 90.0958; 
Lima anp CALLAO. 
Feuillée .. .. 1710 10. 30S, 
Humboldt «+ 1799 9. 59S. 
Duperrey wen t82a" 685" 95:8; 
Fitz-Roy .. .. 1835 = 7. 
VALPARAISO. 
Malaspina ae) LYOS 244e 58S. 
Vancouver -- 1795 44. 15 S. 
Tiitke~ ..  .. 1827 936. 56'S. 
King ee ee 1829 40. 11S. 
Fitz-Roy .. ..- 1835 938. 03S. 
ConcEP¢cIoN. 
Feuillée .. .. 1710 55. 30S. 
Perouse .. .. 1786 50. 00S, 
Duperrey «- 1823 44. 55S. 
Observer, Date. Variation. 
Liitke - | .. "55 1897 45. 33 Ss. 
King oe «- 1829 45, 10S. 
Fitz-Roy .. .. 1835 43. 15S. 
Kine GrorGE Sounp. 
Vancouver ae B7GL) MOA SANS: 
Flinders .. .. 1801 64. 01 S, 
Fitz-Roy .. .. 1836 64. 41S. 
Van DiEMEN’s LAND. 
Cook ee LET ORs 
Bertrand... .. 1792 70. 50S. 
Dentrecasteaux 1792 70. 30S, 
De Rossel wo 27037 On tO. 
Fitz-Roy.. .. 1836 70. 35S. 
SYDNEY. 
Flinders .. .. 1803 62. 52S. 
Freycinet ~.. Agig, 62.047 S: 
Brisbane .. .. 1821 62. 36S. 
Duperrey -» 1824 62. 208. 
Fitz-Roy .. .- 1836 62. 49S. 
N. ZEALAND(Bay orIsianps). 
Duperrey.. .. 1824 59. 45S. 
Fitz-Roy .. 1835 59. 32S. 
TIERRA DEL FuEGo. 
Bayley 9252) (2%. 
Lat. 55°. 22/5 herr 66. 548. 
Long. 70. 03. 
King on ins 
Lat. 55°. 51/5; {vba 59. 44S. 
Long. 67. 34. 
FALKLAND IsLANDs. 
Freycinet... .. 1820 55. 208. 
Duperrey -- 1822 54. 498. 
Fitz-Roy .. .. 1833-4 53. 25S. 
Sra CarHARINA. 
Duperrey -- 1822 22, 548. 
King o'6) Mele 8278 OSS: 
Rio DE JANEIRO. 
La Caille.. .. 1751 20, OS. 
Freycinet -- 1817 14. 42§. 
King sia ae 182604 cogs, 
Liitke as) we 1027) PAs ergs 
Erman «. —.s-) 1830 -19.°3m)8i 
Fitz-Roy .. .. 1832 13. 37S. 
We may classify the changes which are taking place in the dip 
in the southern hemisphere in four divisions, characterised by an 
