COMPUTATION OF LONGITUDE BETWEEN SYDNEY AND WELLINGTON, BY THE ASTRONOMER ROYAL, SYDNEY.

Appendix to the Journals of the House of Representatives, 1876 Session I, H-06a

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1876. NEW ZEALAND.

COMPUTATION OF LONGITUDE BETWEEN SYDNEY AND WELLINGTON, BY THE ASTRONOMER ROYAL, SYDNEY.

Presented to hoth Souses of the General Assembly by Command of Sis Excellency.

The Hon. W. B. D. Mantell to the Hon. the Colonial Secbetaby. Sib,— Wellington, Ist May, 1876. I have the honor to enclose, for the information of the Government, a copy of tables recently received by the Yen. Archdeacon Stock from the Astronomer Eoyal, Sydney, containing the computations of longitude based on signals exchanged between this Observatory and the Sydney Observatory, by electric cable, on the 26th March ultimo. I have, &c, The Hon. the Colonial Secretary, Wellington. W. B. D. Mantell.

Computations of Longitude by Signals sent from Sydney to Wellington, New Zealand, 26th March, 1876. h. X. s. No. 1. —9 ~29 ~14637 Wellington time of receiving Sydney signals. 9, 13-209 Correction for Wellington time. 9 „ 38 ~27-906 8 „ 4 „ 11-317 Sydney time of sending. 1„34 „ 16-589 Longitude. No. 2.—9 ~40 ~35-250 Wellington time of receiving Sydney signals. 9„ 13 269 Correction for Wellington time. 9,,49 ~48-519 " 8„ 15 ~31946 Sydney time of sending. 1„34 „ 16573 Longitude. No. 3. —10 ~23 ~35619 Wellington time of receiving Sydney signals. 9 „ 13-669 Correction for Wellington time. 10 ~32 ~48-888 9„58 „ 32-331 Sydney time of sending. 1„34 „ 16557 Longitude.

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H. M. S. No. 4.—10 „37 „ 33-500 Wellington time of receiving Sydney signals. 9 , 13-269 Correction for "Wellington time. 10,,46,, 46769 9„12 „ 30107 Sydney time of sending. 1,, 34 ~16-662 Longitude. No. 5. —10„50„46344 "Wellington time of receiving Sydney signals. 9 ~13-269 Correction for "Wellington time. 10 ~59 „ 59-613 9„25 „ 42842 Sydney time of sending. 1„34 „ 18-771 Longitude. No. 6. —11 ;/ 3,,5905 l "Wellington time of receiving Sydney signals. 9 „'l3-269 Correction for "Wellington time. 11,, 13 „ 12350 9„38 „ 55658 Sydney time of sending. 1„34 „ 16-692 Longitude. No. 7.—11 „16 ~41-833 "Wellington time of receiving Sydney signals. 9, 13269 Correction for Wellington time. 11 ~25 ~55102 9 1 51 „ 38-555 Sydney time of sending. 1„34 „ 16-547 Longitude. No. 8. —11 ~28 ~32-550 Wellington time of receiving Sydney signals. 9,' 13269 Correction for Wellington time. 11 ~37 ~45-819 10 „ 3 „ 29092 Sydney time of sending. 1,, 34 ~16-722 Longitude. 11. C. Etjssell, Sydney Observatory, 26th March, 1876. Government Astronomer. Results of Longitude Signals, Wellington, New Zealand, io Sydney, New South Wales. No. of Series. Time. 2 1,, 34 ~15281 3 1,34 ~15-340 4 1,34 ~15 333 5 1,34 ~15-388 6 1,, 34 ~15-408 7 1, 34 „ 15-401 S 1,, 34 ~15-349 1 „34,, 15 3500 Mean Time. Besults of Longitude Signals, Sydney, New South Wales, to New Zealand (Wellington) No. of Series. Time. 1 1, 34 „ 16-589 2 1,34, 16-573 3 1,34 ~16 557 4 1,34 ~16 662 5 1,34,16-771 6 1,, 34 ~16-692 7 1, 34, 16-547 8 1,, 34 ~10727 1 „ 34 „ 10 6398 Mean time. ' New Zealand to Sydney ... ... ... 1„34 „ 15-3500 3, 8,,31-9598 Mean of both ... ... ... ... 1,^34,,15-9949 Longitude. 11. C. Russell, Sydney Observatory, 26th March, 1876. Government Astronomer.

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Signals from Wellington to Sydney. No. 2. | No. 5. Mean of series by New Zealand Mean of series by New Zealand clock 9*84,52-600 clock 10 „ 44 „ 30000 Correction for average time and Correction for average time and clock rate combined ... 9 ~13269 clock rate combined 9,,13269 9 ~44,, 5769 10„53„43269 Mean of signals received on Mean of signals received on Sydney chronograph ... 8,, 9,,50488 Sydney chronograph 9,,19,,27931 Longitude 1„34 „ 15-281 Longitude 1„34 „ 15338 No. 3. No. 6. Mean of series by New Zealand Mean of series by New Zealand clock 10 „ 17,,30 000 clock 10,,57,,30000 Correction for average time and Correction for average time and clock rate combined ... 9,, 13269 clock rate combined ... ... 9,,13209 10,,26,,43-269 11 „ 6,,43-269 Mean of signals received on Mean of signals received on Sydney chronograph ... 8 ~52 ~27929 Sydney chronograph ... 9„32 „ 27-861 Longitude 1 ~34 ~15340 Longitude 1,, 34 ~15-408 No. 4. No. 7. Mean series by New Zealand Mean of series by New Zealand clock 10,,30,,30000 clock 11 ~10 ~30-000 Correction for average time and Correction for average time and clock rate combined ... 9,,13 269 clock rate combined 9,,13-269 10 „ 39 ~43-269 11 ~19 ~43269 Mean of signals received on Mean of signals received on Sydney chronograph ... 9,, 5,,27936 Sydney chronograph ... 94,,5,,27-868 Longitude 1,,34,,15-333 Longitude 1,, 34 ~15-401 No. 8. Mean of series by New Zealand clock 11 „23 „ 30-000 Correction for average time and clock rate combined 9 „ 13-269 11 ~32 ~43-269 Mean of signals received on Sydney chronograph ... 9,,58 ~27920 Longitude 1 ~34 ~15-349 11. C. Russell, Sydney Observatory, 26th March, 1876. Government Astronomer.

By Authority: G Didsbuhy, Government Printer, "Wellington. —187 G. Price 3d.]