ON THE HIGH TIDES OF JUNE 15-17. 53 



astronomical conditions at that epoch, I find that tlie moon was 

 in opposition at 4h. 44m. p.m. on May 24th, that she was in a 

 very close perigee (56-05 equatorial radii)eleven hours subsequently 

 and that the vertex of tlie wave passed again very close to Sydney. 

 It appears therefore that the astronomical conditions were then 

 eminently favourable for extraordinarily high night tides. I may 

 very suitably bring my remarks to a close by pointing out that 

 immediately after the full moon of July we shall be again visited 

 with high spring tides in the night, though the conditions are not 

 quite so favourable for height as those which obtained at the last 

 full moon. I may also add that after July the tides will not be 

 remarkably high from immediate astronomical causes till the new 

 moon of December next. The conjunction occurs at lOh. 56m. 

 p.m., Sydney time, on December 22nd, the perigee (distance in 

 equatorial radii =56-03) thirteen hours later, and the moon's 

 greatest south declination, 24°, at 5h. p.m. on the 23rd. The 

 highest tides will occur about the 24th and 25th, but on this 

 occasion they will be in the day-time. These expectations are of 

 course founded on purely 

 may be that the magnitude of t 

 which are regarded as strictly 

 heavy easterly gales and a low 

 predicted tides will probably 



WED.YHSDAY, JULY 3, 1SS9. 



Prof. LiVERSiDGE, M.A., F.R.S., President, in the Chair. 



Twenty members were present. 



The minutes of the last meeting were read and confirmed. 



The certificate of one new candidate was read for the third tii 

 and of two for the second time. 



The following gentleman was duly elected an ordinary mem 

 of the Society f— 



Mingaye, John C. 11., F.c.s. ; Parramatta. 



In the absence of the author ]\[r. F. B. Kvngdon read a pa 

 '•y^JoJin Tebbutt, F.KA.s., " On the High Tides of June 15— 1' 



