PRESIDENTIAL ADDRESS. 21 



When funds are available the Council intend to adopt a 

 cheaper style of binding than formerly and will thus 

 minimise the difficulty. 



Exchanges. — The number of kindred institutions at 

 present on the exchange list to whom copies of the Society's 

 Journal and Proceedings are sent is 433. The following 

 publications were received last year in returu : — 375 

 volumes, 1,873 parts, 116 reports, 222 pamphlets, 2 maps, 

 and 1 engraving, total 2,589. This includes a complete set 

 of the Transactions of the American Society of Mechanical 

 Engineers, Vols. i. to xxiv., 1880 to 1903. 



Papers read in 1904. — During the past year the Society 

 held nine meetings at which 15 papers were read, the 

 average attendance of members was 36 and of visitors 3. 



Art. I. — Presidential Address. By F. B.Guthrie, f.i.c, f.c.s., 

 Chemist, Department of Agriculture, N.S.W.; Acting Pro- 

 fessor of Chemistry, The University, Sydney. 



Art. II. — On the absence of gum and the presence of a new diglu- 

 coside in the Kinos of the Eucalypts. By Henry G. Smith, 

 f.c.s., Assistant Curator, Technological Museum, Sydney. 



Art. III. — On some Natural Grafts between Indigenous Trees. By 

 J. H. Maiden, f.l.s., Government Botanist and Director, 

 Botanic Gardens. [With Plates] 



Art. IV. — Possible Relation between Sunspots and Volcanic and 

 Seismic Phenomena and Climate. By H. I. Jensen, B.Sc, 

 Junior Demonstrator in Chemistry and Geology, University 

 of Sydney. (Communicated by Prof. T. W. E. David, b.a., 

 f.r.s., etc.) 



Art. V. — On Eucalyptus Kinos, their value for Tinctures, and the 

 non-gelatinization of the product of certain species. By 

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

 Museum, Sydney. 



Art. VI. — Notes on the Theory and Practice of Concrete-Iron Con- 

 structions. By F. M. Gummow, m.c.e. [With Plates] 



Art. VII. — Current Papers, No. 8. By H. A. Lenehan, f.r.a.s., 

 Acting Government Astronomer. [With Diagrams] 



Art. VIII. — Further Experiments on the Strength and Elasticity 

 of Eeinforced Concrete. By W. H. Warren, Wh. Sc, M. Inst* 

 C.E„ M.Am. Soc.c.e., Challis Professor of Engineering. 



Art. IX. — The Flood Silt of the Hunter and Hawkesbury Eivers. 

 By Professor T. W. E. David, b.a., f.g.s., f.r.s., and Acting 

 Professor F. B. Guthrie, f.i.c, f.c.s. 



