5

<2.—la;

Table D. Mean Annual Values of the Magnetic Elements at Christchurch Observatory.

An account of the earthquake of the, 25th December, 1922 (with map); a list of the earthquakes recorded at Christchurch by Milne seismograph No. 16 ; a discussion of the magnetic observations ; Vector diagrams for the, seasons ; -monthly and annual curves of declination and horizontal force, and tables of hourly values of the declination and horizontal force for 1923, are contained in Volume I of the Records of the Survey, a supplementary report to be published this year for the first tirrre. Proposed Operations for the Year 1924 25. Geodetic Triangulation. —The field-work of this survey will be conducted by Mr. 11. M. Boss, surveyor. The observations will be continued by means of an 8 in. geodetic theodolite at the stations of the, scheme on which signals have been erected. Standard Surveys.- -The proposed work for the year includes tire extension of survey in progress at Auckland, Te Aroha, New Plymouth, and Invercargill by Messrs. Kensington, King, Haase, and Otway respectively. The commencement of the work at Whangarei, Hamilton, Blenheim, Christchurch, Dannevirke, and Dunedin is contemplated as soon as trained surveyors are. available. Settlement Surveys. The work may be summarized as follows : 67 square miles of minor triangulation, 248,650 acres rural survey, 145,509 acres Native-land survey, 208 miles road survey, and 1.44 acres of town survey. The, amount of work in each land district is shown in Table 4 below. Topographical Survey.- Three parties will continue operations in. the vicinity of Rotorua arrd. survey the thermal region and the settled pumice area adjoining, and oik; party will continue the survey of the area in Nelson district over which the officers of the Cawthron Institute are conducting a soil survey. Miscellaneous. In addition to the above-mentioned works, there is the customary examination and checking of plans, the inspection of surveys, the work of computing the harmonic constant for the tidal predictions, measuring the curves of the maguetograph records, the preparation of various tables, and the drawing and compilation of the maps for publication. General. l'roelamation of Roads, &c. — During the year under review twenty-three applications for' the proclamation of road-lines laid off by the Native Land Court under sections 48, 49, 50, and 52 of the Native, Land Amendment Act, 1913, were dealt with. Statutory notices of intention to proclaim the roads, together with plans showing the location of same, were, forwarded to the local bodies of the districts affected, in terms of section 15 of the Native Land Amendment Act, 191.4, to enable such local bodies to forward any objections or representations they might wish to make prior to the issue, of the, Gazette notices. Under the Land for Settlements Act a number of unused and unformed road-lines intersecting estates acquired under the Act were closed, in terms of section 80 thereof, to enable the areas to be incorporated irr the new subdivisions surveyed for closer settlement. Under the Land Transfer Act 218 warrants for the issue of certificates of title were examined and certified in terms of section 13 of the, Act. In addition, several cases of overlaps and defective surveys arising out; of land transactions carried forward from the early days were investigated and reported upon. Publication of Maps. —For some years past the, demands of the public arrd the Government Departments for maps has not been fully met, on aocount of the yearly volume, of work produced by the draughtsman being too groat for tho Printing Department to cope with. A number of maps was therefore printed by a private! firm in Auckland during the, year, and it is proposed to print several survey-district maps next year privately, until such time as the staff of the Printing Department can

Date. Declination Annual 10. of N. Change. Horizontal Force. Annual Change. Vertical Force. Annual Inclination Annual Change. South. Change. Hourly Values Published in Annual Report. 1002 .. 1903 .. 1904 .. 16 151 16 18-3 10 21-8 + 3-2 + 3-5 + 3-6 C.GI.S. Unit. 0-22094 0-22009 0-22044 y -25 -25 -10 C.G.S. Unit. 0-55277 0-55280 0-55307 y + 9 + 21 +41 07 40-8 07 42-3 07 44-1 + 1-50 + 1-80 + 1-70 1912-13 1912-13 1912-13 1905 .. 1906 .. 1907 .. 16 25-4 -1-2-4 0-22028 -23 0-55348 + 28 07 45-8 + 1-80 1919-20 IO 31-1 1908 .. 1909 .. 1910 .. 10 37-6 -l-V-4 0-22515 -27 0-55485 + 12 -l-i-40 1920-21 07 54-8 1911 .. 1912 .. 1913 .. 16 39-0 + 2-5 0-22494 -23 0-55497 - 9 07 56-2 -1-1-00 16 44-0 ! +0-8 0-22449 -35 0-55478 --is 67 58-2 + ±■60 1913-14 1914 .. 1915 .. 1916 .. 10 44-8 i 10 47-0 16 49-8 16 53-0 16 55-7 16 58-6 +2-2 + 2-8 + 3-2 + 2-7 + 2-9 + 3-1 0-22414 0-22387 0-22355 -27 -32 -27 0-55465 + 1 67 59-8 + 1-67 1914-15 "'Sept., 1918 *Sept., 1918 1917 .. 1918 .. 1919 .. 0-22328 0-22304 0-22280 -24 -24 -19 0-55486 0-55510 0-55507 + 30 - 9 + 18 08 04-8 08 00-7 68 07-8 + 1-90 + 1-10 + 1-40 *Mar., 1921 1918-19 1919-20 1920 .. 1921 .. 1922 .. 1923 .. 17 01-7 17 04-0 17 08-3 17 11-7 -1-2-9 + 3-7 +3-4' 0-22201 0-22241 0-22217 0-22209 -20 -24 08 0-55525 0-55528 0-55507 0-55526 + 03 -21 ! 19 68 09 2 08 10-3 08 11-2 08 12-0 +1-10 + 0-90 i 0-80 t1020-21 i1921-22 t1922-23 f1923-24 * M.ean hourly values published in New 'ealand Jom 'rial of Science md Technoloi Wt Special publication.