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

OBSEllVATIONS OF INTENSITY. 621 Table I. Rio de Janeiro. Time of Vibration. Interval. Loss. Per Diem. Horizontal. As a Dipping Needle. August 39, 1826... September 15, 1827 December 21, 1828 June 1, 1830 S. 545,2 551,7 561,1 563,8 S. 537.0 543,5 552,7 555,4 Days. } 382 462 527 s. 6,5 9,2 2,7 •017 •020 •005 Table II. Station. Date. Time of Vibration. Intensity. At the Station. At Rio. Rio=l,000. CO II (3 Horizon. As a Dipping Needle. As a Dipping Needle, 1826 May 31 1826 June 22 ) and 24J 1827 Nov. 3 1826 Oct. 29 » and Nov. 6 J 1829 Jan. 10 1827 Dec. 18 1828 Oct, 8 1830 June 1 1829 Mar. 20 1827 Jan. 15 ) and 22 J — Mar. 27 1828 Jan. 28 — May 8 — June 18 \ and July 30 J 1830 April 26 1829 Sept. 1 and Dec. 15 " 1630 Feb. 19 1829 Dec. 18 1830 May 12 1829 Aug. 4 1830 Jan. 1 1 and Feb. 1 / s. 627,79 557,08 553,58 549,44 562,78 553,87 560,95 564,89 576,37 584,29 585,08 589,36 596,54 595,81 598,97 565,23 551,83 555,59 557,18 548,59 551,60 S. 430,1 465,4 532,7 497,0 509,0 496,7 503,0 506,6 446,0 414,9 415,4 417,5 422,6 422,1 424,3 453,7 464,7 466,5 467,4 479,5 482,1 536,6 536,6 544,5 538,1 552,8 545,4 551,3 555,4 553,1 539,4 540,6 546,2 548,2 549,3 555,1 554,2 554,8 554,6 555,3 553,9 554,6 1,556 1,330 1,045 1,172-1 1,179/ ''''' 1,206 T 1,201 > 1,203 l,202j 1.538 1,691-) 1,694) ''''' 1,712 1,683^ 1,694 ? 1,700 l,712j 1,402 1,425 \:t\i} >.4i2 '.334. ,,3,9 1,324/ 1,377 1,177 0,920 1,041 1,065 1,361 1,498 1,505 1.321 1,262 1,350 1,176 PortPraya...'! Sta Catharina Gorriti -| Monte Video Sea Bear Bay St. Martin f Cove J Port Famine _ / I Chiloe 1 Juan Fernandez Talcahuano Valparaiso... I