a—i.

We have also the following data on record : —

(3.) Differences of Longitude.

"We may now proceed to the final results deducible from the foregoing : —

(4.) Comparison of Results referred to Mount Cook Initial Station.

The longitude of Mount Cook Initial Station hitherto adopted by the Survey Department is llh. 39m. 9-925., derived from moon culminations at Rockyside by the late Mr. J. T. Thomson, F.R.G.S., M.1.C.E., and telegraphic and trigonometrical connections. This value has not so far been abandoned owing to the doubt existing as to the true longitude of the station of

88

Date. Stations. Observers. Difference of Longitude. Authority. Old time-ball and Wellington Observatory Hutt and Rockyside Observatories Hutt and Wellington Observatories Pipitea Point and Wellington Observatory Wellington Cathedral and Pipitea Point Wellington Observatory and Mount Cook Initial Station Burnham and Wellington Observatories Burnbam and Mount Cook Initial Station Fort Macquarie and Pipitea ' Point Garden Island (Sydney) and Wellington Cathedral Sydney and Wellington Observatories Sydney Observatory and Mount Cook Initial Station Melbourne and Sydney Observatories Sydney Observatory and Port Macquarie Sydney Observatory and Garden Island Greenwich and Syciney Observatories Greenwich and Sydney Observatories H. m. s. 0 0 125* Parliamentary Paper, 1871, G.-23, p. 4. Parliamentary Paper, 1871, G.-23, p. 10. Parliamentary Paper, 1871, G.-23, p. 10. Parliamentary Paper, 1871, G.-23, p. 4. Trans. N.Z. Inst., Vol. vii., p. 504. 1871 Messrs. Thomson and Jackson Mr. H. Jackson 0 17 44-519} 1871 0 0 35-413* 1871 a • • 0 0 2-88* Captain Nares 0 0 0-87 ' 1884 Mr. C. W. Adams .. 0 0 1-21* Report on the Surveys of New Zealand, 1883-84, p. iii. Parliamentary Paper, 1876, H.-6, p. 2. Report on the Surveys of New Zealand, 1883-84, p. iii. Trans. N.Z. Inst., Vol. vii., p. 504. 1874-75 Major Palmer 0 9 52-37} 0 9 53-88* 1852-54 Captain Stokes 1 34 15-53f 1874 Captain Nares 1 34 15-47t 1876 Messrs. Russell and Stock Messrs. Russell and Adams 1 34 15-9949} Parliamentary Paper, 1876, H.-6a, p. 2. Report on the Surveys of New Zealand, 1883-84, p. 24. Trans. N.Z. Inst., Vol. vii., p. 505. 1883 1 34' 16-985} 0 24 55-81} 0 0 2-63 p. 504. Captain Nares 0 0 5-73 Mr. Baracchi 10 4 48-47} Report on the Surveys of New Zealand, 1883-84, p. iv. Nautical Almanao, 1902, p. 600. Messrs. Ellery, Russell, and Todd 10 4 49-54} *By triansulation. + By transit of chronometers. } By telegraphic signal.

Origin. Longitude. Difference of Longitude. Observers. Mount Cook Initial Station. Wellington Observatory. ' ort Macquarie H. m. s. 10 4 56 (Admiralty) 11 39 17-00 (Captain Carkeek) H 39 50-73 (Mr. H. Jackson) 11 21 59-61 (Mr. J. T.Thomson) H. m. s. 1 34 13-86f Captain Stokes H. m. s. 11 39 9 86 H. m. s. 11 39 8-65 )ld time-ball, Wellington lutt Observatory 0 0 0-04* 11 39 16-96 0 0 34-203* 11 39 16-527 iockyside .. Jurnham 0 17 10-316 J* 0 9 53-58}* Messrs. J. T. Thomson, J. McKerrow, and H. Jackson Major Palmer and assistants 11 39 9-926 11 39 6-68 Melbourne Observatory 11 29 13-10 (Major Palmer) 11 29 13-10 ' (Major Palmer) 9 39 54-80 (Mr. BUery) 9 39 54-80 (Mr. Ellery) 9 39 54-80 (Mr. Ellery) 10 4 48-47} (Mr. Baracchi) 10 4 50-81 ' (Mr. Russell) 10 4 49-54+ (Messrs. Ellery, Russell, and Todd) 0 9 53-88* 1 59 12-30}f* 1 59 16-21}f* 1 59 13-01}* Captain Stokes Captain Nares Messrs. Russell and Stock 11 39 6-98 11 39 7-10 11 39 11-01 11 39 7-81 11 39 5.89 11 39 9.80 11 39 6.60 lydney 1 34 16-98} Mesers. Russell and Adams 11 39 5-45 1 34 16-98} a> 11 39 7-79 It • " * * 1 34 16-98} 11 39 6-52 11 39 5-31 * By triangulation. t By transit of chronometers. t By telegraphic signal.