— 40 — 
J. H. Maiden has again supplied some contributions to the knowl- 
edge of the eucalyptus species, to which we can here refer only briefly, 
as they are essentially interesting from a botanical point of view. In 
the first place we would mention a work on Eucalyptus Behriana 
F. V. M. 1) in which are discussed the characteristic differences between 
that species of eucalyptus and E. hemiphloia F. v. M., E. populifolia^ 
E. largiflorens^ E. odorata and E. incrassata var. dmnosa. 
A further short work deals with Eucalyptus Macarthuri D. and M., 
whose presence in Tasmania is confirmed. As this species of eucalyptus 
presumably will become important on account of the oil it yields, which 
is rich in geranyl acetate, Maiden recommends that the trees, in the 
interest of the oil distillation, should not be felled, but that only the 
branches should be cut off. 
In the long list of Australian useful trees 2) the author also mentions 
Eucalyptus haemastoma ^ E. haemastoma var. micrantha^ and describes 
these along with E. punctata D. C. which is frequently mistaken for the 
grandiflora-YwA of E. resinifera, and is popularly known as Grey gum. 
Treatises by the same author, on E. Baueriana Schauer and E. caly- 
cogona Turcz., are found in the Proc. of the Linn. Soc. of N. S. W. 1902, 
Vol. II, and on E. tereticoimis Smith and E. 7'ostrata Schlechtendal , in 
the Bulletin de I'herbier Boissier, 2^ series, 1902. 
We desire to avail ourselves of this opportunity, to call the attention 
of those of our readers who take an interest in the extraordinarily 
varied family of eucalypts and in the essential oils obtained from their 
individual species, to the recently published work by R. T. Baker and 
H. G. Smith: ''A research on the eucalypts especially in regard to 
their essential oils."^) 
Both authors have now for a long time been connected with the 
Sydney Technological Museum, the first chiefly as botanist, the other 
as chemist, and they have occupied themselves particularly with a 
thorough examination of the family of eucalypts, and, indeed, their 
names have been repeatedly mentioned in these pages in discussing 
their previous work. 
The present work, which is provided with very good habitat-pictures, 
and also illustrations of branches of the individual species with the 
organs which are the most important for the identification and differ- 
entiation, represents an epitome of everything that has up to now 
become known of eucalypts, both from a botanical and a chemical 
point of view. The fact that the authors have on this occasion taken their 
^) Trans, of the Royal Soc. of South Australia 1902. 
^) Agricultural Gazette of N. S. Wales, 1902. 
^) Sydney, 1902. 
