3

C.—la

At New Plymouth Mr. A. C. Haase reports forty miles of streets measured and fifty new blocks placed, besides triangulation work to control the survey. Mr. C. Otway has continued the field work of the Invercargill standard survey. Mr. Clapperton completed the field work of the Blenheim standard survey. Mr. Adams has revised 37J miles of standard traverse in the suburbs of Christchurch, and is now engaged in completing the standard survey of Timaru. Various minor repairs and reinstatements have been carried out in other districts, chiefly in connection with the permanent surfacing of roads and the consequent new formation required. Topographical Survey. The plane table survey on 4 in.-to-l-mile scale is being continued at Rotorua and Taranaki, while a start on a small area at Ngaruawahia has been commenced. Details of these will be given in the "Records of the Survey." Field Inspections. Inspections have been carried out generally throughout the districts by a senior staff officer. Usually these disclose that the surveyor is taking pains to turn out correct work, but in several instances the work has not been up to the standard required by the regulations, and the surveyors responsible have been called upon to make good any defects found. Several of the districts, owing to shortage of staff and urgent settlement surveys, have not had sufficient inspections made, and steps are being taken to see that this important duty is properly and sufficiently carried out throughout the Dominion. Tidal Survey. The work for the year under report comprised the completion of the analysis for the Port of Lyttelton for 1924, together with a complete fresh analysis for the Ports of New Plymouth (1920) and Dunedin (1925) ; also a portion of the analysis for the Port of Lyttelton for 1925. The constants derived therefrom, combined with previous determined values, are contained in Table C.

Table C. Mean Values of the Harmonic Constants for Use in preparing Tide-tables.

Auckland. Bluff. Dunedin. Lyttelton. New Plymouth. Wellington. Westport. A 0 = 5-72 ft. A 0 = 5-27 ft. A 0 =3-23ft. A o =3-20ft. A o ==5'50ft. A 0 =2-93ft. A 0 =4-77i't. Tide Symbol. I H. K. H. K. j H. j K. H. K. H. K. H. K. H. | lv. Short Period. Ft. ° Ft. 0 Ft. 0 Ft. ° Ft. I 0 Ft. 0 Ft. 0 SI 0-011 31-74 0-010 100-05 ! 0-014 49-25 0-028 26-40 0-009 ! 91-27 0-002 354-03 0-011 78-04 82 0-580 268-31 0-502 49-79 0-252 128-63 0-167 141-96 1-094 306-40 0-100 330-28 0-959 332-22 S4 0-019 331-83 0-009 223-42 0-007 317-91 0-009 201-67 0-007 | 341-49 ! 0-004 215-90 0-007 32-75 86 0-003 41-77 0-006 170-17 0-002 119-29 0-015 341-69 0-006 87-89 0-004 310-31 0-006 331-21 Ml 0-009 144-71 0-01J 127-33 0-010 54-12 0 010 62-75 0-008 64-46 0-006 22-11 0-012 143-08 M2 3-818 206-37 2-858 35-68 2-438 122-54 2-888 124-31 3-989 277-21 1-611 138-99 3-747 304-43 M3 0-039 199-21 0-011 272-74 0-014 276-10 0-013 141-03 0-030 161-11 0-019 175-72 0-021 208-15 M4 0-106 124-54 0-088 226-45 0-264 179-09 0-013 92-11 0-080 51-27 0-041 251-11 0-057 53-90 M6 0-026 314-33 0-086 79-53 0-066 358-91 0-020 65-53 0-025 255-94 0-012 98-61 0-026 36-82 01 0-053 145-25 0-113 72-91 0-089" 70-26 0-087 61-61 0-048 106-48 0-103 36-57 0-093 45-98 K1 0-235 169-17 0-058 115-68 0-076 93-02 0-150 83-63 0-205 185-77 0-082 84-49 0-073 184-39 K2 0-139 256-95 0-134 46-77 0-089 118-09 0-055 104-38 0-304 298-03 0-044 7-49 0-276 328-04 PI 0-077 163-91 0-023 105-44 0-021 102-31 0-050 102-03 0-060 177-11 0-032 77-13 0-022 133-91 J1 0-017 185-22 0-006 198-96 0-005 74-09 0-006 163-11 0-019 228-96 0-010 178-05 0-013 219-25 Q1 0-009 67-58 0-031 47-70 0-027 76-05 0-022 58-32 0-018 34-58 0-036 22-17 0-037 33-03 |i§ 3W3| 0 H " L2 0-108 219-79 0-109 32-44 i 0-148 110-43 0-076 167-26 0-119 273-21 0-029 156-82 0-097 285-41 N2 0-793 179-27 0-654 16-50 i 0-520 103-50 0-649 94-34 0-810 259-40 0-398 104-65 0-770 289-02 V2 0-203 206-34 0-153 53-35 0-109 96 32 0-144 96-48 0-188 289-63 0-107 113-02 0-194 320-40 U2 0-102 178-49 0-065 7-93 0-032 57-82 0-103 61-72 0-139 251-55 0-067 88-08 0-134 283-83 T2 0-057 294-82 0-020 89-11 0-018 230-35 0-029 232-05 0-068 30-68 0-031 280-97 0-053 9-08 (MS)4 0-173 195-31 0-081 2-78 0-105 141-56 0-102 108-39 0-096 258-83 0-035 133-28 0-105 294-78 (2SM)2 0-066 303-10 0-045 121-63 0-045 13-29 0-061 29-09 0-083 217-38 0-033 356-74 0-076 199-89 R2 0-015 211 16 0-014 111-90 0-027 211-24 0-016 137-14 0-035 307-59 0-011 138-68 0-035 178-80 Long Period. Mm ' 0-045 195-02 0-043 1-94 0-057 359-75 0-049 122-12 0-062 354-67 0-039 174-85 0-051 199-18 Mf 0-050 206-01 0-067 235-36 0-088 236-03 0-066 183-24 0-028 353-73 0-060 232-19 0-055 7-87 MSf 0-035 209-57 0-063 326-77 0-080 78-63 0-098 144-29 0-041 148-95 0-043 106-30 0-069 98-39 Sa 0-186 30-61 0-089 16-98 0-139 286-69 0-121 296-28 0-083 80-95 0-108 332-12 0-113 «1-51 8sa 0-071 164-94 0-115 82-05 0-099 155-74 0-090 142-69 0-093 78-89 0-073 111-04 0-116 111-03 The tide-tables lor the year 1928 for the seven New Zealand ports (Auckland, New Plymouth, Wellington, Lyttelton, Dunedin, Bluff, and Westport) for which tidal predictions are