PROCEEDINGS OF THE SECTIONS 



SECTION A. 



ASTRONOMY, MATHEMATICS AND PHYSICS. 



Section Committee (other than office-bearers) : — Professors 

 Carslaw, Hosking and Pollock, Messrs. C. E. Adams, P. Barrachi, 

 G. H. Knibbs, R. H. Roe, K. ff. Swanw ck. 



Wednesday, 11th January. 



Papers read : - 



" The Harmonic Analysis of Tidal CJbservations." C. E. 

 Adams, M.Sc. 



" Tidal Predictions." C. E. Adams. 



" The Time Control of the Welhngton Tide Gauge." C E. 

 Adams. 



" An Inductive Method of Deriving Certain Mathematical 

 Formulae." H. Tomkys. 



" A Direct Method of Estabhshing the Converse of a Pro- 

 position." H. Tomkys. 



" Standard Astronomy ; its Present Position and Future 

 Prospects." W. E. Cooke. 



" The Geographical Position, Character and Custom of 

 Acute Cyclones as an Indication of Coming Weather." 

 H. A. Fiunt. 



" The Trilinear Geometry of the Complete Quadrilateral." 

 E. C. Hogg. 



A special excursion to St. Ignatius' College, Riverview, took 

 place on Friday, 13th January (Sections A and C). 



Members travelled by the 2 p.m. Lane Cove River steamer, 

 leaving No. 7 Jetty, Circular Quay. 



Mr. Lawrence Hargrave kindl}^ invited any members mterested 

 in aviation to inspect his workshop at 1 Wunulla Road, Woollahra 

 Point, Rose Bay, any afternoon between 3 and 5 o'clock. 



