COMMITTEE EOR INVESTIGATION OF SEISMOLO- 

 GICAL PHENOMENA IN AUSTRALASIA. 



Members of Committee. 



Sir Charles Todd | Mr. Tarlton PhillipPs 



Professor T. W. E. David | Mr. A. Macaulay 



Professor J. W. Gregory | Mr. P. Baracchi and 



Dr. C. C. Farr Mr. G. Hogben 



Mr. W. E. Cook I (Secretaries). 



REPORT OF THE SEISMOLOGICAL COMMITTEE, COVERING 

 THE PERIOD JANUARY, 1905— JANUARY, 1907. 



Since the last report of this Committee the seismological work 

 carried out in Austraha has consisted as follows, viz. : — The continuous 

 registration of seismic disturbances by the Milne horizontal-pendulum 

 seismograph, installed at the observatories of Perth (Western Australia) 

 and Melbourne (Victoria). 



Last year a similar instrument was installed at the Sydney Obser- 

 vatory, which has since been kept in continuous action. 



The Australian, as well as the New Zealand, results of the work in 

 question have been or are being published in the annual reports of the 

 Seismological Committee of the British Association, and in separate 

 works of some of the observers themselves. 



It is very desirable that seismographs — preferably of the same 

 pattern as those now in use at Sydney, Perth, Melbourne, Wellington, 

 and Christchurch — should be installed at Brisbane, Port Darwin, 

 Hobart, or Launceston, and the council of this Association should be 

 asked to take the necessary steps to induce the authorities of the 

 respective States to assist in this purpose. 



COMMITTEE TO RECOMMEND A UNIFORM SYSTEM 

 FOR THE NOMENCLATURE OF THE IGNEOUS 

 ROCKS OF AUSTRALASIA. 



Members. 



Professor David 

 Professor Gregory 

 Mr. a. W. Howitt 

 Mr. W. G. Woolnough 

 Dr. Marshall 



Mr. W. H. Twelvetrees 

 Mr. G. W. Card, and 

 Mr, S. Jevons (Joint 

 Secretaries). 



The Committee did not meet in the interval, and no report was 

 furnished. 



