J, Fibrous Plant, 

 edited by Sir James Hector, k.o.m.g., m.d., f.b.s., 

 (Second Edition) 1889. 1 



Miscellaneous. 

 (Names of Donors are in Italics.) 

 (A., B. and C.) Shewing the locality of the deaths 

 in the City for the Six Months ended March 1, 1889, 

 prepared by the City Health Officer. 



The Right Worshipful the Mayor. 



ON THE HIGH TIDES OF JUNE IS—ITtii. 

 By John Tebbutt, F.R.A.S., &c. 



iRead before the Royal Society of N.S.W., July 3, ISSO.] 



In a brief note published in the Herald of the 21st instant, the 

 Crovernment Astronomer has drawn attention to an unusually 

 high tide which occurred at Fort Denison in Sydney Harbour in 

 the night of June 15th, the water having risen to a point 6 feet 

 ^5 inches above the zero of the gauge. I may state that ever since 

 the establishment of the tide gauge on the South Creek, due south 

 of my Observatory, towards the close of March last I had looked 

 forward with interest to my own local records of the tides im- 

 mediately to follow the full moon of June 1889. In a letter to 

 my esteemed friend, the Rev. Dr. WooUs of Burwood, dated April 

 11th, I expressed my anticipations respecting the probable magni- 

 tude of these tides. I had already remarked that at her opposition 

 in June the moon would be within two hours only of her perigee, 

 and that a very close one, her distance from the centre of the earth 

 V'eing only 55 -99 equatorial radii of the latter body. In addition to 

 these two conditions favourable to the production of a large tide 



her point of greatest south declination, 23 degrees, only thirty-one 

 hours after the opposition. It will thus be seen that, not only 

 yould the conditions for a large tide-wave generally be forthcom- 

 ing, but also that the vertex of the tide-wave itself would approach 

 close to the parallels of Sydney and Windsor. This circumstance 

 would give a high perpendicular section for the wave as it passed 

 i of the Observatories. These were my reasons for 



