IX 



ACKNOWLEDGMENTS. 



A WORK of this character, the preparation of which has now extended over 

 many years, and covers such a wide range, has necessarily caused us to solicit 

 the help of others residing in the various Australian States, and in every 

 instance this assistance has been readily and generously given. Due acknow- 

 ledgment was made in the first edition, whilst in this, the second edition, we 

 gratefully recognise the help received in various ways from the following : 



To the members of the Scientific Staff : Mr. M. B. Welch, B.Sc. 

 (Sydney), Economic Botanist, for valuable help by assisting in the reading of 

 proofs, and in other ways, but more particularly do we wish to acknowledge 

 the sectioning of the leaves for their chromatic illustrations, reproduced in 

 this work. Mr. A. R. Penfold, F.C.S., Economic Chemist, for chemical assist- 

 ance in the later part of these investigations, particularly in connection with 

 piperitol, terpineol, the aromatic aldehydes and cineol estimation. Mr. T. C. 

 Roughley, Economic Zoologist, for the Eudesmol and Australol photographs, and 

 Mr. C. F. Laseron, for collecting the material. 



We are also indebted to Mr. G. Beyer, Chief Clerk, for the indexing; and 

 to Messrs. F. R. Rae and H. G. Goy for clerical help. 



Also to Messrs. D. Cannon, F. Morrison, A. J. Holloway, and W. H. Austin. 



NEW SOUTH WALES: 



J. H. Maiden, F.R.S., Government Botanist; Dr. Cuthbert Hall, Parra- 

 matta; Gillard Gordon Ltd., Sydney; A. J. Bedwell, Sydney; 

 R. H. Cambage, F.L.S., Sydney; D. E. Chalker, Hill Top; 

 W. T. Farrell, Sydney; C. Gough, Youri ; E. McGrath, Youri ; 

 R. H. McNeice, Sydney ; W. J. Quigg, Wingello ; and Mr. Tivey, 

 Kybeen. 

 VICTORIA : 



Professor A. f. Ewart, D.Sc., Government Botanist; J. Cronin, Curator, 

 Botanic Gardens, Melbourne ; P. R. H. St. John, Botanic Gardens, 

 Melbourne; Messrs. Cuming Smith & Co., Melbourne; W. Russell 

 Grimwade, B.Sc., Melbourne; D. Clark, Officer; and C. W. 

 D' Alton, The Grampians. 

 SOUTH AUSTRALIA : 



Walter Gill, F.L.S., Conservator of Forests; Officers of the Education 



Department ; and E. Burgess, Kangaroo Island. 

 WEST AUSTRALIA : 



C. E. Lane-Poole, Conservator of Forests; and W. B. Hooper of the 



Agricultural Department. 

 QUEENSLAND : 



The late P. McMahon, Director of Forests; F. D. Ferguson, Gladstone; 

 the late T. Ingham, Brisbane ; J. L. Adams, Cooktown ; and H. S. 

 Owbridge, Boyne River. 

 TASMANIA : 



L. G. Irby, Conservator of Forests ; L. Rodway, Government Botanist ; 

 and A. H. Higgs. 



We also wish to express our thankfulness to the Government Printer, 

 Mr. W. A. Gullick, and the members of his staff for valuable help and expert 

 advice during the passage of the work through the press. 



