Wellington i-'kUosoi)lncal Society. 83 



'I'lic iinportant sul)j<.Tt of ti<l;il ()l)S('r\-at ions at the oiitlyiii^ islands has also 

 leieived consideration, and the Couni'il is now endeavomiiiu to olitain the services 

 of an observer at the Chatham islands. 



Since the last annual meeting twenty-two new members have been elected, three 

 have resigned, two have died, and one has been struck off the roll for non-payment of 

 subscription. The total nunibei on tlie iull is now V-Vl. indudinn five life members 

 and one honorary member. 



A statement of the receipts and expenditure for the yeai' eiuled odth .Septeml)er, 

 duly audited, shows that, inclusive of the balance l)rought foiward fiom last year 

 ^£3it !ts. Sd.), the receipts amounted to £1B;5 «s. 2d., and the total expenditure \vas 

 jSld.S Os. !)d., leaving a credit balance of £55 7s. 5d. The Hesearch Fund, on fixed 

 deposit with the Bank of New Zealand, now amounts to £4,S Is. 4d.. making a total 

 sum in hand of £1(1)5 JSs. !)d. 



AHeratn)ii of liiih-s. — lu accortlancL' with liulc No. "iG. the rfsohition 

 of the Council of 27th July, 1!)10, to rc'sciiicl the followino' paragraph at 

 the end of Kule Xo. 2G, was .stibiuitted for continuation : — " Kesolution 

 for by-law, adopted Ijy tlie society 7th Aj>ril. 18G8 : That one-sixth 

 part of the annual income of the society be contributed towards the 

 extension and maintenance of the museum and library of the New Zea- 

 land Institute." On the motion of Mr. Thomas Kino, seconded bv 

 Mr. P. (t. Morgan, the Council's resohttion was confirmed. 



I'ajiers. — 1. "The Post-Tertiary Geological History of tlie Ohau 

 Kiver and of the Adjacent Coastal Plain," by U. Leslie Adkin. 



2. "The Igneous Ixocks of tlie Wailii (loldtiehl." by Percy (i. Mor- 

 gan, M.A. 



3. "A Xote on tlie Structure of the Southern Alps," by Percy G. 

 Morgan, M.A. 



4. " Xotes on Actinians from the Kernjadecs," bv F. G. A. Stuckev, 

 M.A. 



5. " Xotes on Tunicates from the Kermailecs. ' bv F. G. A. Stuckev. 

 M.A. 



G. " The First X'oted Occurrence of Pentathionic Acid in Mineral 

 Waters," by Dr. J. S. Maclaurin. 



7. " The Harmonic Analysis of Tidal Observations," l)^• C. E. A<lanis. 

 M.Sc, F.R.A.S. 



Abstract. 



The paper gives a complete example of Dr. Borgen's method* of harmonic 

 analysis of tidal observations. The observations submitted to analysis are those 

 given in the Great Trigonometrical Survey of India, Vol. xvi, and are hourly ob- 

 servations for Bombay for the year 1884. The hourly observations were first 

 sunnned continuously throughout the year, and were cut down to one decimal of 

 a foot and written out in a list of sums, as under : — 



Dai 



(t 

 1 



307 

 368 



The figures in the list are given in tenths of a foot. The method consists in 

 sdecting from the list the pa)ticular days that will give the best values of the tide 

 sought, at the same time eliminating the effect of the S. tides and reducing the 

 effect of the other tides as much as possible. 



* Ueber eine neue Methode, die liannoiii.^chen Konstanteii di r Oezeiteii abzuh-itcn. Voii Admirali- 

 tatsrath Prof. Dr. Borpeii. Aiinaitn der Hvdrographie und Maritiinen Mctcoiologk-, Juni, Juli. 

 August, 18{)4. 



