Narrative of the surveying voyages of his majesty's ships Adventure and Beagle (vol.2- Appendix): between the years 1826 and 1836 : describing their examination of the southern shores of South America, and the Beagles's circumnavigation of the globe

85 OTHER POSITIONS ASCERTAINED ANIJ USED TO CONTINUE THE CHAIN OF MERIDIAN DISTANCES. Not included in the Survey. Lat. South. Long. Var. East. H.W. R. iiS. / // ; // / h. m. Feet. Otaheite — Point Venus* — extremity 17 29 15 149 30 00 7 54 Noon- 1 * By continuing the chain of meridian dis-' every tances westward from Bahia (in Brazil), day. Otaheite (Point Venus extremity) would [ be in J And by taking the measures eastward fromi Bahia / 149 34 30 149 26 14 The mean of the two is .. 149 30 22 The longitudes in the following list, from New Zealand to Ascension, are obtained by adding the meridian distances eastivard from Bahia. EAST, New Zealand — Bay of Islands — Paihia Islet 36 16 30 174 09 45 14 00 9 «6 6 N.W. Sydney — Fort Macquarrie — flag-staff 33 51 30 151 17 00 10 24 7 36 6 Paramatta — Observatory 151 04 00 Hobart Town— Fort Mulgrave 42 53 30 147 24 15 11 06 8 00 5 w. King George Sound — Princess Royal Har-"!^ bour — New Government Buildings ... J 35 02 10 117 56 30 WEST. 5 36 8 00 4 E. Keeling Islands — Direction Island— west! point J 12 05 22 96 54 45 1 12 5 27 5 N. w. Mauritius— Port Louis — Observatory 20 09 25 57 31 30 11 18 1 02 2 N.W. Cape of Good Hope — Simons Bay^east end"\ of Dock Yard / 34 11 24 18 25 45 28 30 2 30 5 Royal Observatory 18 28 30 St. Helena — high water mark, in the meri-1 WEST. dian of Observatory J 15 55 15 5 42 45 18 00 4 50 3w. N. w Ascension — Barrack Square 7 55 33 14 24 15 «3 30 5 30 2 w. By the Beagle's Chronometers, the meridian' distances between Falmouth, Plymouth, 1 Portsmouth, aiid Greenwich, are as fol- ( lows : — J Portsmouth Observatory — R.N. College — "1 from Greenwich Observatory J 1 0607-5 Devonport (Government House) — from^ Portsmouth Observatory / 3 03 49 '5 N. B. — These are Pendennis Castle — Falmouth — from Devon-\ port (Government House) J And Falmouth — Pendennis Castle— west ofl ident \ ical with the 52 46-5 / meas Tiarc ures ot Dr. 'ks. Greenwich J 5 02 43-5 - 1 In the foregoing Table, every position, variation, and notice of tide, is the result of observations ' made by officers of the Adventure or the Beagle, therefore they are, strictly .speaking, original, and have no reference whatever to observations made by other persons. An explanation of the methods and instruments used, and of the basis on which the longitudes, especially, are founded, is given, in an abridged form, at the end of the Appendix. The positions of those points only are given which are considered to be, generally speaking, satisfactorily ascertained by actual observation on shore, or well connected by triangulation to those stations at which the artificial horizon was used. Where tidal notices are given opposite to summits of mountains, or other places at some dis- tance from the sea, it is to be understood that they refer to a point at which the sea approaches nearest to that specified.