CONTENTS. 



VOLUME LV. 



Page. 



Art. I.— Presidential Address. By J. N angle, o.b.e., f.r.a.b. 



(Issued June 24th, 1921.) 1 



Art. II. — On the Occurrence of a New Phenol in the Essential 

 Oils of the ' Leptospermum/ " by A. R. Penfold, f.c.s. 

 (Issued August 10th, 1921.) ... 49 



Art. Ill, — Note on the Relation of Streams to Geological Structure 

 with special reference to Boat-hook Bends. By W. R. 

 Browne, b.Sc. (Issued August 10th, 1921.) 52 



Art. IV. — The Decomposition of Dimethyl Oxalate by Acetic Acid. 

 By'E. E. Turner, b.a., d.Sc, a.i.c, and F. H. Wilson. 

 (Issued August 10th, 1921.) 63 



Art. V. — Notes on Cassiterite Crystals from the New England 

 District, New South Wales, and Stanthorpe, Queensland. 

 By Miss Marie Bentivoglio, b'*Sc. (Communicated by 

 Assistant-Professor Leo A. Cotton, m.a., d.sc). [With Plate 

 I.] (Issued September 30th, 1921.) 65 



Art. VI.— The Kurrajong Earthquake of August 15th, 1919. By 

 Assistant-Professor Leo A. Cotton, m.a., d.sc (Issued Sep- 

 tember 30th, 1921.) 83 



Art. VII. — Acacia Seedlings, Fart VII. By R. H. Cambage, f.l.s. 



\_Wiih Plates II -V.'] (Issued October 27th, 1921.) 105 



Art. VIII. — A preliminary examination of the late Palaeozoic fold- 

 ing in the Hunter River District, New South Wales. By 

 G. D. Osborne, b.Sc. [With Plate VI.~] (Issued October 27th, 

 1921.) 124 



Art. IX. — Note on the position of the double linkage in Piperitone. 

 By A. R. Penfold, f.c.s. [With Plate VII.] (Issued October, 

 27th, 1921.) 139 



Art. X. — Earth Movements at Burrinjuck as recorded by Horizontal 

 Pendulum Observations. By Assistant-Professor Leo A. 

 Cotton, m.a., d.sc. (Issued October 27tb, 1921.) 143 



Art. XI. — Records of Australian Botanists, (Second Supplement). 

 By J. H. Maiden, i.s.o., f.r.s., f.l.s. [With Plates VIII, IX.] 

 (Issued November 16th, 1921.) 150 



Art. XII. — The Essential Oil of Leptospermum flavescens (Smith). 



By A. R. Penfold, f.c.s. (Issued December 19th, 1921.)... 170 



Art. XIII. — Preliminary note on the Occurrence of Porphyritic 

 Intrusions at Yass, New South Wales. By C. W. Mann. 

 (Issued December 19th, 1921.) [ With Plate ; X] 180 



