CONTENTS OF PROCEEDINGS, 1917. 



PART L (No. 165). 

 (Issued nth July, 1917). 



PACKS 



Presidential Address delivered at the Forty-second Annual Meet- 

 ing, March 28th, 1917, by Alex. fl. Hamiltox 1-25 



On the Morphology of the Caudal Gills of the Larva? of Zygop- 

 terid Dragonflies. Introduction, Part i. (General Morpho- 

 logy), and Part ii. (Studies of the Separate Types). By R. 

 J. Tilly ARD, M.A., B.Sc, F.L.S., F.E.S., Linnean Macleay 

 Fellow of the Society in Zoology. (Plates i.-vi., and 32 text- 

 figures) 31-112 



Hydrocyanic Acid in Plants. Part iii. By James M. Petkie, 

 D.Sc, F.I.C., Linnean Macleay Fellow of the Societj'^ in 

 Biochemistry ... ... ... ... ... ... ... 113-117 



The Chemical Investigation of some Poisonous Plants of the N.O. 

 Solanacea?. Part iv. The Chemistry of the Duboisias. By 

 James M. Petrie, D.Sc, F.I.C, Linnean Macleay Fellow 

 of the Society in Biochemistry ... ... ... ... ... llS-13o 



The Chemical Investigation of some Poisonous Plants of the N.O. 

 Solanacete. Part v. The Alkaloids of Diihoisia Leichhardtii 

 F.v.M. By James M. Petrie, D.Sc, F.I.C, Linnean 

 Macleay Fellow of the Society in Biochemistry ... ... 137-14") 



The Percentage of Carbon Dioxide in Expired Alveolar Air. Hy 

 Ethel C. Pinkertox, B.Sc, Government Research Scholar 

 in the University of Sydney ... ... ... ... ... 14«>l(il 



Contributions to our knowledge of Soil-Fertility. No. xv. The 

 Action of certain Micro-organisms upon the numbers of Bac- 

 teria in the Soil. By R. Gkeiu-Smith, D.Sc, Macleay 

 Bacteriologist to the Society ... ... ... ... ... 1(52-166 



The Wing- Venation of Lepidoptera (Preliminary Report). By 

 R. J. Tillvaru, M.A., B.Sc, F.L.S., F.E.S., Linnean 

 Macleay Fellow of the Society in Zoology. (Seven text- 

 figures) 167-17 



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