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CONTENTS. 



Page. 



Art. IX. — Continued ... ... 113 



Art. X. — The Physiography of Botany Bay. By G. H. Halligan, 



f.g.s. [With Plates V- VII.'] .' 120 



Art. XI — Notes on the rectifying property in Silicon and Selenium. 

 By O. U. Vonwillbr, b.sc, Assistant- Professor of Physics 

 in the University of Sydney 129 



Art. XII. — The ionisation caused by penetrating y rays in a closed 

 thick-walled vessel. By S. E. Pierce, b.sc, Deas-Thomson 

 Scholar in Physics in the University of Sydney. (Communi- 

 cated by Professor Pollock) 138 



Art. XIII. — The Extraction of Radium from the Olary Ores. 



By S. Radcliff 145 



Art. XIV. — Vanilla, and a short and simple method for the deter- 

 mination of Vanillin. By W. M Doherty, f.i.c, f.c.s. 

 [With Plate VII.'] 157 



Art. XV. — A flame test for Chloral hydrate. By W. M. Doherty, 



f.i.c, p.c.s 163 



Art. XVI. — On some transverse tests of Australian and Foreign 

 Timbers. By James Nangle, fr.a.s., Superintendent of 

 Technical Education 165 



Art XVII. — Some Physico-Chemical measurements on Milk. By 

 H. B. Taylor, b.sc, Science Research Scholar, University 

 of Sydney. (Communicated by Professor Fawsitt) 174 



Art. XVIII — On the Australian Melaleucas and their Essential 

 Oils, pact V. By R. T. Baker and H. G. Smith [With 

 Plate VlIL] ^ 193 



Art. IX. — On a new species of Eucalyptus from Northern Queens- 

 land. By J. H. Maiden, f.l.s., and R. H. Cambaue, l.s., f.l.s. 215 



Art. XX. — Notes on Eucalyptus, with descriptions of new species, 



No. 2. By J. H. Maiden ... .'. 217 



Art. XXL— The occurrence of Trimethylamine and its occurrence 

 in the Australian Salt-bush, Rhagodia hastata, R. Br. By 

 R. Wf. Challinor, f.i.c, f.c.s 236 



Art. XXII. — Note on an Ostracod, and an Ostracodal Limestone 



• , '. from the Middle Devonian of New South Wales. By 

 Frederick Chapman, a.l.s., f.r.m.s., Palaeontologist to the 

 National Museum, Melbourne. (Communicated by W. S. 

 Dun). [With Plate IX] ... 244 



