CO129-329 - Governor Nathan - 1905 [7-12] — Page 513

COP Y.

Appendix 11.

510

(a).

Note on latest editions of charts 1459, 3279, and

3280 of the harbour:- "the soundings are reduced to Low Water

of an exceptionally Low Spring Tide, or 19 feet 2 inches below

the copper bolt at the North-best corner of one of the store-

-houses in the Royal Naval Yard".

(b).

Note on former editions of the same:- "The Sound-

-ings are reduced to Low Water of an exceptionally Low Spring

Tide, equivalent to 2 feet 4 inches on the Royal Naval Yard

Tide Pole."

(c). Note on verious charts, such as 3429, of areas

outside of the harbour:- "Soundings in fathoms reduced to 18

feet 2 inches below the copper boit on North-West corner of

building in Royal Naval Yard, Hongkong".

(a). -Note on the brass plate attached to the Copper

Bolt above referred to :- "This Copper Bolt is 17 feet 10 inches

above the level of the soundings taken by His Majesty's Survey-

-ing Vessel "Rifleman" in 1886, along the foreshore of Bong-

-kong (Victoria) Harbour".

(e). Memorandum dated 18th. December, 1901, from the

Hydrographer to the Commanding Officer, H.M.S."Waterwitch":-

"For any further surveys of Hongkong Waters a datur level should

be taken of:- 3' 0" on the Dockyard Gauge, or 1' 8" on the

Kaulung Cbservatory Gauge, or 18' 6" below the Copper Bolt.

This is very nearly the same as the datum established by the

"Riflemen" in 1666".

(f). Note on Commander D'Arcy's chart of hungbom Bay

showing survey made in January, 1905:- "The soundings are re-

-duced to Low Water ordinary Spring Tides, equivalent to 11' 0"

on