6 H. A. LENEHAN. 
VII.—Reinforced Concrete, Paper III. By W. H. Warren, wh. Se. 
M. Inst. C.E., M. Am, Soc. C.E., Challis Professor of Engineering, Sydney 
University. 
VIII.—On the occurrence of Inclusions of Basic Plutonic Rocks in a 
Dyke near Kiama. By C. A. Stssm1tcn, F.G.S. 
IX.—Note on some simple Models for use in the Teaching of Elementary 
Crystallography. By W.G. Woo.LnouGH, D.Sc, F.G4.8. (Communi- 
cated by Prof. T. W. E. Davin, B.A., F.R.S.) 
X.—Provisional Determination of Astronomical Refraction from 
observations made with the Meridian Circle Instrument ot the 
Sydney Observatory. By C. J. MERFIELD, F.R.A.S., Mitglied der 
Astronomischen Gesellschaft. 
XI.—Latitude of the Sydney Observatory. By C. J. MERFIELD, F.R.A.S., 
Mitglied der Astronomischen Gesellschaft. 
XII.—A method of separating the Clay and Sand in Clay Soils, and 
those rich in organic matter. By L. Consen, Chemical Laboratory, 
Department of Agriculture. (Communicated by F. B. GuTHRIE; 
1... 8.C-8:) 
XIII.—Sociology of some Australian Tribes. By R. H. Maruews, 
L.s., Corres. Memb. Anthrop. Soc., Washington. 
XIV.—On an undescribed species of Leptospermum and its Essential 
Oil. By Ricuarp T. BAKgR, F.L.s., Curator, and Henry G. Smita, 
F.c.s., Assistant Curator, Technological Museum, Sydney. [With 
Plate} 
XV.—Note on a hollow Lightning Conductor crushed by the discharge. 
By J. A. Potuock, Professor of Physics, and 8. H. BARRAcLoUGH, 
Lecturer in Mechanical Engineering, in the University of Sydney, 
[With Plate. ] 
Section.—The Engineering Section held four meetings 
at which the following papers were read :— 
1.—Annual Address. By S. H. BARRACLOUGH, B.E., M.M.E., Assoc M. Inst. C.E., 
Chairman of the Engineering Section. 
2.—Notes on a tour through America, Great Britain and Europe. By 
HENRY DEANE, M.A., M. Inst. C.E. 
3.—Some Notes on the Storage and Regulation of Water for Irrigation 
Purposes. By T. WuircHurcH SEAVER, B.E. (Communicated by 
W. E. CuokKE, M.E.) 
Lectures.—The following Popular Science Lectures were 
delivered during the Session :— 
May 30, 1905—“ Stellar Evolution,” by Prof. BicKERTON. 
August 18, 1905—‘* The Monotremes and the origin of Mammals.” by J. P. 
HILL, D.Sc., F.LS. | 
