Xi. PREFACE. 
indebted for many notes. He is much indebted to his assistant, 
Mr. R. T. Baker, for patient aid in revising the proofs; aid which 
has frequently necessitated sacrifice of his own time. 
As this is the first book covering the whole of the subjects to 
which it refers, the author trusts it may be found useful. Many of 
the observations will be found to be original; some have been 
jotted down in his note-book during the last few years, others 
have been obtained from actual examination of the excellent 
collection of Australian products now in this Museum. While 
this work has been passing through the press he has obtained a 
mass of further information, and cordially invites correspondence 
on Australian economic botany. 
TEcHNOLoGIcAL Museum, 
Fanuary, 1889. 
