22 C. O. BURGE. 



Art. X. — Ethnological Notes on the Aboriginal Tribes of New 

 South Wales and Victoria. By R. H. Mathews, l.s., Associe 

 etranger Soc. d'Anthrop. de Paris; Corres. Memb. Anthrop. 

 Soc, Washington, U.S.A., etc. 



Art. XI. — Preliminary Observations on Radio- Activity and the 

 Occurrence of Radium in Australian Minerals. By D. 

 Mawson, b.e., Junior Demonstrator in Chemistry, and 

 T. H. Labt, Acting-Demonstrator in Chemistry in the 

 University of Sydney. 



Art. XII. — Pot Experiments to Determine the Limits of Endur- 

 ance of different Farm-Crops for certain Injurious Substances. 

 By F. B. Guthrie, f.i.c., f.c.s., and R. Helms. 



Art. XIII.— The Occurrence of Isolated Augite Crystals at the top 

 of the Permo-Carboniferous Upper Marine Mudstones at 

 Gerringong, New South Wales. By H. G. Foxall. (Com- 

 municated by Prof. T. W. E. David, b.a., f.g s., f.r.s.) 



Art. XIV.— The Approximate Colorimetric Estimation of Nickel 

 and Cobalt in presence of one another. By R. W. Challtnor. 

 (Communicated by Acting Professor J. A. Schofield, f.i.c, 

 f.c.s., A.E.S.M.) 



Art. XV. — Note on a] Combined Wash-Bottle and Pipette. By 

 J. W. Hogarth. (Communicated by Acting Professor J. A. 

 Schofield, f.i.c, f.c.s., a.r.s.m.) 



Sections. — The Engineering Section held two Sessions at 

 which three papers were read and discussed : — 



Art. XVI. — Tacheometer Surveying with an Ordinary Theodolite. 



By Thomas Kennedy, Assoc, m. Inst. C.e, 

 Art. XVII.— Water Filtration. By J. M. Smail, m. Inst. c.e. 

 Art. XVIII. — Filtration of Water at the Hunter District Water 



Works, West Maitland. By J. B. Henson, Assoc. M. Inst. C.E. 



Lectures. — A course of five Popular Science Lectures 

 was delivered during the Session 1904, which were well 

 attended : — 



June 23— The Distribution of Life in Australasia, by Charles 



Hedley, f.l.s. 

 July 28— The Fabric of the Universe, by Actg. Prof. G. H. Knibbs, 



F.R A.S. 



September 22— The Solar System and Southern Sky, by H. A. 



Lenehan, f.r.a.s. 

 October 27 — The Steam Engine and its Modern Kivals, by S. H. 



BaRRACLOUGH, B.E., M.M.E., Assoc. M. Inst. C.E. 



November 24 — The Nervous System in its genesis and development, 

 by J. Froude Flashman, m.d. 



