PRESIDENTIAL ADDRESS. 15 



so hard and so long in a country where travel bristles with 

 dangers and difficulties. 



If now we turn to South Australia we find that most 

 interesting features have lately come to light. The early 

 report by A. R. 0. Selwyn 1 revealed a rough plan of the 

 build of the Mount Lofty Ranges. The numerous records 

 and reports by Mr. H. Y. L. Brown, Assoc. r..s.m., 2 contain 

 much information as to trend lines at intervals over this 

 vast territory, and still more important information is 

 afforded by his geological map of South Australia. The 

 Horn Exploring Expedition to Central Australia elucidated 

 the chief tectonic features of the MacDonnell Ranges. 3 

 Mr. H. Basedow has published useful information as to the 

 trend lines of the Musgrave, Mann, Everard, and Ayers 

 Ranges. 4 Dr. W. G. Woolnough 5 has contributed a paper, 

 chiefly penological, on the Mount Lofty Ranges. Dr. 

 Douglas Mawson, b.-e., d.sc., 6 lias dealt with the structure of 

 the north-eastern virgation of the Mount Lofty Range 

 where it spreads away into the Barrier Ranges. Of late 

 years a flood of light has been thrown on the obscure ques- 

 tions of the trend lines of South Australia by Mr. Walter 

 Howchin. 7 



1 Geological Notes of a Journey in South Australia from Cape Jervis 

 to Mount Serle. Pari. Paper No. 20, Adelaide, 1859. 



2 Chiefly on the mining fields of South Australia and Northern Terri- 

 tory, published by the Mines Department of South Australia or as 

 Parliamentary Papers. 



3 Horn Scientific Expedition to Central Australia. Report on the 

 Geology by Professor Tate and J. A. Watt, m.a., b.sc. 



4 Trans, and Proc Roy. Soc. S.A., Vol. xxix, pp. 57 - 102, pis. xiii - xx. 



5 Trans, and Proc. Roy. Soc. S.A., Vol. xxxn, pp. 121 - 137, pis. i, ii. 



6 Thesis for D.Sc. Degree presented to the University of Adelaide, 

 1909-10. 



7 Trans, and Proc. Roy. Soc. S.A., Vol. xxviii, (1904), pp. 253-280. 

 pis. xxxvii-xliv; Ibid., Vol. xxx, (1906) p. 227. Rep. Austr. Ass. Adv, 

 Sci., Vol. xi, p. 114. The Geography of South Australia including the 

 Northern Territory, by Walter Howchin, f.g.s., and Professor J. W. 

 Gregory, d.sc, f.r.s. Q.J.G.S., Vol. lxiv, 1908 pp. 234-258, by Walter 

 Howchin. 



