ON HARMONIC ANALYSIS OP TIDAL OBSERVATIONS. 



345 



The number of stations considered is 43. The aggregate amount of record 

 analysed up to the present amounts to about 480 years. 



Canadian Work cm Harmonic Afialysis of Tidal Heights. 



Gordon's Analyses. 



The results were published in 1887. 



Analyses viade for Survey. 



The results are mostly unpublished. 



The number of different stations considered is 1 9, Point Atkinson being prac- 

 tically identical with Sand Heads, which it has replaced ; the aggregate length of 

 record analysed amounts to about 160 years. 



Australian Work on Harmonic Analysis of Tidal Heights. 



Analyses Made. 



The aggregate length of record analysed amounts to about eight years. 



Work done in New Zealand on Harmonic Analysis of Tidal Heights. 



Analyses made by the Survey. 

 The prefixed dates are those of publication, the others those of the records. 

 1911 Wellington. 1912 Auckland. 1914 Dunedin. 



1909 1908-9 1911-12 



