REPORTS OF RESEARCH COMMITTEES. 



297 



SECTION A. 



3. Tidal Survey Committee. 



, The following Keport by Professor R. W. Chapman, of Adelaide, 

 on Tide Gauges and Predictions in Australia, has been forwarded by 

 Mr. C. E. Adams, Government Astronomer and Seismologist, New 

 Zealand. 



Tide Gauges akd Predictions. 



N.S.W. 



South 

 Australia 



Victoria 



Western 

 Australia 



Tasmania 

 Queensland 



Number 



of Automatic 



Tide 



Gauges. 



Seven 



Five 



One 



Four 



Two 

 Four 



Situation of Gauges. 



Camp Cove, near South 

 Head (Sydney Harbor); 

 Fort Denison (Sydney 

 Harbor) ; Cockatoo Is- 

 land (Sydney Harbor) ; 

 Ballina (Richmond 

 River) ; Yamba (Clar- 

 ence River) ; entrance 

 of Macleay River ; en- 

 trance to Newcastle 



Dockyard, Port Adelaide ; 

 Queen's Wharf, Port 

 Pirie ; Beachport Jetty ; 

 Port Lincoln Town 

 Jetty ; Cape Thevenard 

 Jetty 



Breakwater 

 liamstown 



Pier, Wil- 



Fremantle ; Port Hedland, 



North-west Coast; 

 Perth; Henderson Naval 

 Base 



Castray Esplanade, Ho- 



bart ; Macquarie Heads, 



Strahan 

 Two on the Brisbane 



River ; Two on the 



Fitzroy. 



Tidal Predictions 



The Sydney Records have 

 been sent to the United 

 States Coast and Geo- 

 detic Survey, where the 

 records have been sub- 

 jected to harmonic ana- 

 lysis, and tidal predic- 

 tions for each year are 

 issued in the General 

 Tide Tables published 

 by that Department. 



The records for Port Ade 

 laide have been analyzed 

 and local jiredictions are 

 published each year by 

 the Harbors" Board, 

 made on a special form 

 of tide predicting mac- 

 hine devised by Captain 

 Inglis and described m 

 the Trans. A.A.A.S., 

 Vol. VII. Predictions 

 for Port Adelaide, based 

 upon the same analysis, 

 are also published in the 

 United States Coast and 

 Geodetic Survey general 

 tide tables each year. 



Tidal i:)redictions are issued 

 in the general tide tables 

 of the United States 

 Coast and Geodetic Sur- 

 vey. 



Records have been analyzed 

 at the Perth Observatory, 

 and predictions for Port 

 Hedland are issued in 

 the general tide tables of 

 the United States Coast 

 and Geodetic Survey. 



Records have not been 

 analyzed and no pre- 

 dictions are made. 



Records have not been 

 analyzed and no pre- 

 dictions are made. 



