PROCEEDINGS OF SECTION A. 



19 



From the constants given in columns 1 and 4 the tides for 

 Wellington and Auckland have been predicted, and are published in 

 the British Admiralty Time-tables, and in the New Zealand Nautical 

 Almanac. Comparisons between the predictions and actuality prove 

 the correctness of the constants ; for these comparisons see New 

 Zealand Tidal Survey : Report of Department of Lands and Survey, 

 Wellington, 1910-11 and 1911-12. 



Other values of the tidal constants (1) by the United States Coast 

 and Geodetic Survey, and (2) by Mr. T. Wright, are given in columns 

 2 ;ind 5, and 3 and 6 respectively. 



In the United States Tide-tables predictions for Wellington and 

 Auckland are also given ; but these do not agree so closely with 

 octuality as those depending on the constants in columns 1 and 4. 



(1) New Z3al.xnd Tidal Survey : Report of Departiueut of Lands and Survey, Wellington, for 

 1910-11 : Hourly ordinatss for the calendar year 1909. 



(2) U.S. Coast and Geodetic Survey, Washington : Tide Tables for the year 1911, p. 456 : 

 Hourly ordiQat3s for one calendar year 1894. 



(3) Thomas Wright, Proc. Royal Society, London, A. Vol. 83, p. 127 : Harmonic Tidal Con- 

 stants for csrtain Chinese and New Zealand Ports : High and low waters for the year 1901. 



(4) New Zealand Tidal Survey : Report of Department of Lands and Survey, WelUngton, for 

 1911-12 : Hourly ordinates for year beginning 1-908, December 1. 



(5) U.S. Coast and Geodetic Survey, Washington : Tide Tables for year 1912, p. 460 : High 

 and low waters for two calendar years, 1896 (Service Hydrographique de la Marino, Paris), and 

 1900 (Th? Admiralty, London). 



(6) Thomas Wright, Proc. Royal Society, London, A. Vol. as, p. 127 : Harmonic Tidal Con- 

 stants for certain Chinese and New Zealand Ports : High and low waters for one year beginning 

 190O, May!. 



