(vi.) 



Page 



Art. XII. — A method of separating; the Clay and Sand in Clay 

 Soils, and those rich in organic matter. By L. Cohen, 

 Chemical Laboratory, Department of Agriculture. (Com- 

 municated by F. B. Guthrie, f.i c, f.c.s.) ... ... ... 98 



Art. XIII. — Sociology of some Australian Tribes. By E. H. 



Mathews, l.s., Corres. Memb. Anthrop. Soc, Washington .104 



Art. XIV. — On an undescribed species of Leptospermum and its 

 Essential Oil. By Eichard T. Baker, f.l.s., Curator, and 

 Henry G-. Smith, f.c s., Assistant Curator, Technological 

 Museum, Sydney. [With Plate] 124 



Art. XV. — Note on a hollow Lightning Conductor crushed by 

 the discharge. By J. A. Pollock, Professor of Physics, and 

 S. H. Barraclough, Lecturer in Mechanical Engineering, 

 in the University of Sydney, [With Plate.] 131 



ENGINEEEING SECTION. 



Art. XVI. — Annual Address. By S. H. Barraclough, b.e., m.m.e., 



Assoc M.Inst. C.E., Chairman of the Engineering Section ... v. 



Art. XVII. — Some Notes on the Storage and Eegulation of Water 

 for Irrigation Purposes. By T. Whitchurch Seaver, b.e. 

 (Communicated by W. E. Cooke, m.e.) ...xliii. 



Abstract of Proceedings i. 



Proceedings of the Engineering Section i. 



Index to Volume XXXIX (xxv.) 



