CONTENTS. 



VOLUME XLVII. 



Page. 



Aet. I. — Presidential Address. By E. H. Cambage, l.s., f.l.s. 



[With Plate I. .] 1 



Art. II. — Products of the Action of Concentrated Sulphuric Acid 

 on Iron. By C. W. E. Powell, Science Eesearch Scholar, 

 University of Sydney. (Communicated by Professor C. E. 

 Fawsitt, d.sc, ph.d.) 59 



Art. III. — Note on the Occurrence of Coccidiosis in House Sparrows 

 and in Bovines in N.S.W. By J. Burton Cleland, m.d., ch.m., 

 Principal Microbiologist to the Government of N. S. Wales. 70 



Art. IV. — Note on the Growth of Flowering Stem of Xanthorrhoea 



hastilis, E.Br. By J. Burton Cleland, m.d., ch.m 72 



Art. V. — Note on Agar-agar Seaweed from Western Australia. 



' By J. Burton Cleland, m.d., ch.m. ... ... ... ... 75 



Art. VI. — Notes on Eucalyptus, (with descriptions of new species) 



No. I. By J. H. Maiden, f.l.s 76 



'Art. VII. — Note on the Paraffins of Eucalyptus Oils. By H. G. 



Smith, f.cs. 95 



Art. VIII. — The Seedlings of the Angophoras, and description of a 

 New Species. By Cuthbert Hall, m.d., ch.m. (Communi- 

 cated by E. T. Baker, f.l.s.) [With Plates II - IV.] 98 



Art. IX. — On the Essential Oils of the Angophoras. By H. G. 



Smith, f.cs. 106 



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



f.g.s. [With Plates V., VI.] 120 



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

 By O. U. Vonwiller, 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 Eadium from the Olary Ores. 



By S. Eadcliff 145 



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

 mination of Vanillin. By W. M Dohertt, f.i.c, f.cs. 

 [With Plate VII.'] 157 



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



f.i.c, f.cs 163 



