TIDES AND CURRENTS. 



659 



Tides of* Northumberland Sound and Eefuge Cove, discussed 

 by Professor Haughton. (Proceedings of Royal Society, 

 vol. xxiii., p. 2.) 





Northumberland 

 Sound. 



Eefuge 

 Cove. 



Semi-diurnal tide. 







Mean luni-tidal interval for high water 



+ Oh. 7- 05m. 



- Oh. 26 •7m. 



.5 J J J „ for low water 

 Difference between true luni-tidal and 

 soli-tidal intervals. 



6h. 35- 35m. 

 •38m. 



6h. 1-lm. 



Diurnal tide. 







True soli-tidal interval 

 True luni-tidal „ - 

 True solar coefficient 



7h. 49m. 

 4-7 inches. 



20h. 48m. 





5. The Tides of Port Kennedy. (Proceedings of Royal Society, 

 vol. xxiii., p. 299.) 



The tidal observations made by Sir Leopold McClintock in July 

 1859 have been discussed by Professor Haughton, with the follow- 

 ing results : — 



The heights of the tides were observed every hour for 23 days. 

 They are remarkable for — 



(1.) The magnitude of the diurnal tide. 



(2.) The solar diurnal tide is greater than the lunar diurnal tide. 



Solar Diurnal Tide. 



The true soli-tidal interval is 5h. 12m. 7^s. 



The coefficient 23*4 inches. 

 The true luni-tidal interval of the lunar diurnal tide is 

 Oh. 33m. 50s. 



r 18*4 inches (in time). 

 ■l23^37 



Coefficient 



(in height. 

 Theaee f Id. 4h. 14im. (time). 



ine age | ^^^ ^^^ ^Qim. (height). 



Lunar Semi-diurnal Tide, 



True luni-tidal interval 23h. 18m. Is, 

 Uncorrected ratio of solar 1 ^' 

 and lunar coefficients 



• 1 ^_ / 0*412 inches (height). 

 -/i/"~\0*549 „ (time). 



T t' 2 



