Narrative of the surveying voyages of his majesty's ships Adventure and Beagle (vol.1): between the years 1826 and 1836 : describing their examination of the southern shores of South America, and the Beagles's circumnavigation of the globe

OBSEIIVATIONS Ol' INTENSITY. 517 The following Table contains Captain King's Observations of Intensity, with the times of vibration corrected for the arc and reduced to a standard temperature of 60°. Magnetic Intensity, observed by Capt. P. P. Kingbetween 1826 and 1831. Station. Date. Greenwich , Madeira ..=. Teiieriffe .. Port Praya Rio de Janeii'o < Sta Catharina ... Gorriti I Monte Video ...-j Port Sta Elena Sea Bear Bay... St. Martin Cove < Port Famine ...-, Chiloe I Juan Fernandez Talcahuano Valparaiso '. 1826 Mar. '22 1831 Jan. 24 1826 May 31 — Jiinei2 — — 22 _ — 24 _ Aug.29 1827 Sept. 12 — — 15 182B 1827 1826 1829 1827 1828 1830 1826 1829 1827 1830 1829 1830 1829 1830 1829 1830 — 15 Dec. 21 Nov. 3 Oct. 29 Nov. 6 Jan. 10 Dec. 18 Oct. 8 June 1 Dec. 4 Mar. 20 Jan. 15 — 15 — 22 Mar. 27 Jan. 28 May 8 June 18 July 30 Apr. 30 Sept. 1 Dec. 15 Feb. 19 Dec. 18 May 12 Aug 4 Jan. 1 Feb. 1 Time. 734,45 776,80 628,68 607,96 559,53 657,58 546,36 552,06 552,95 553,73 653,48 562,55 554,42 550,68 549,63 564,12 655,12 562,00 565,41 557,26 577,36 584,88 583,48 586,82 585,82 589,75 596,49 595,86 594,85 598,96 565,40 565,69 562,77 556,42 567,18 549,10 561,77 553.50 Tlierm. o 55.0 41,6 66,0 75,0 81,6 85,0 77,0 75)6 80,0 83,0 85,0 84,0 67,6 63,0 66,0 80,0 78,3 72,5 59,0 68,0 70,0 56,0 58,0 55,0 64,0 56,0 43,8 32,7 36,2 45,0 54,0 53,0 70,0 67,0 60,5 59,0 77,0 68,5 Corrected Time. Particular place. 733.97 \ 776,01 J 627,79 606,73 557,08 Y 545,16 >, 551,70 561,05 553.58 Observatory Consul'sGarden. Fort St. Pedro. Landing Place, Quail Island. Hat Island. Anhatomiiini. l! The Well. > 549,44 562,78 I \ 553,87 ~| soytjj point near 5^°'95 , the Sea. 564,89 J 556,42 I I.anding-place. 576,37 I Landing-place. . 584,29 -|; Head of the 585.08 J 589,36 -\ 596,54 ~1 J- 596,81 598,97 Cove. ^ 565,23 551,83 656-59 \ 557,18/ 548,59 ~| , 551,60 I' Observatory. San Carlos. Landing-place. Fort Galvez. Almendral.