CONTENTS OF VOLUME XXX, 



RT. I. — Timber Production and (irowtli Ciu-ves in the Mountain Ash 

 (Eucalyptus reo-nans). By E. 'I'. Patton. (Plates I. 

 and ir.) ... ... ... ... ... ... 1 



II. — On a Shell-bed underlying- Volcanic Tuff near Warrnambool ; 

 with Notes on the Age of the Deposit. By Frederick 

 Chapman, A.L.S., and Chas. J. Gabriel. ... ... 4 



III.— The Cause of Bitter Pit. By Alfred J. Ewart, D.Sc, Ph.D. 15 

 IV. — Additions to and Alterations in the Catalogue of the Marine 

 Shells of Victoria. By J. H. Gatliff and C. J. Gabriel. 



(Plate III.) 21 



V. — New or Little-known Victorian Fossils in tlie National 

 Museum. (Part XXI. — Some 'J'ertiary Cetacean Eemains). 

 By Frederick Chapman, A. L.S., &c. (Plates IV. and V.) 32 

 VI. — Description of a New Dividing Engine for Euling Diffraction 



Gratings. By H. J. Gkayson. (Plates VI.-X VII.) ... 44 

 VII. — Abnormal Circulation of a Frog. By Kllinor Archer, B.Sc. 



(Plate XVIII.) 96 



VIII. — The Physiography of the Gleiielg Eiver. By Charles 



Fenneb, D.Sc. (Plate XIX.) ... ... .. 99 



IX.— Some Australian String Figures. By Kathlekn Haddon. 



(Plates XX.-XXIV.) ... ... 121 



X. — A Method of Estimating Small Amounts of Calcium. By 



S. Pern, M.E.C.S., L.R.C.P., Eng. ... ... ... 137 



XL— Chiloglottis Pescottiana, sp. nov. By E. S. Eouers, M.A., 



M.D. (Plate XXV.) ... ... 139 



XII. - Magnetic Deflection of ^^-K.'i'ys : Tabulation of v against RH 



assuming Lorentz Theory. By Miss N. C. B. Ali.kn, B.Sc. 142 

 XIII. — On the Occurrence of Acrotreta in Lower Palaeozoic (Lance- 

 fieldiau and Heathcotian) Shales in Victoria. By 

 Frederick Chapman, A.L.S., &c. (Plate XXVI.) ... 145 

 XIV. — On an Apparently New Type of Cetacean Tooth from the 

 Tertiary of Tasmania. By Frederick Chapman, A.L.S., 



&c. (Plate XXVII.) 149 



XV. — A Contribution to the Theory of Gel Structure. By W. A. 



Osborne, M.B., D.Sc ... ... ... ... 153 



XVI. — On the Formation of "Natural Quarries" in Sub-arid Western 

 Australia. By J. T. .Jutson. (Plates XX VII 1., 



XXIX.) .. 159 



XVII. — ^The Influence of Salts in Eock Weathering in Sub-arid 



Western Australia. By J. T. Jutson. (Plate XXX.) 165 

 XVIII. — Contributions to the Flora of Australia, No. 26. By Alfred 



J. Ewart, D.Sc, Ph.D. ... ... ... ... 173 



XIX. — On Chlorophyll, Carotin and Xanthophyll, and on the 

 Production of Sugar from Formaldehyde. By Alfred 

 J. Ewart, D.Sc, Ph.D. .. ... ... ... 178 



