180 R. W. CHALLINOR, E. CHEEL, AND A. R. PENFOLD. 
constituents. Its specific gravity at +3° C. is 0°8929; optical 
rotation zero; refractive index at 20° OC. 1°4875. 
The @ naphthocinchoninic acid derivative prepared in 
the usual way and purified, was crystalline and melted at 
200° C. 
Citryl naphthocinchoninic acid melts at 200° OC. These 
results show this aldehyde to be citral. 
The non aldehydic portion of the oil is still under inves- 
tigation, sufficient material for a complete examination 
not yet being accumulated. 
There appears to be a small amount of a phenol present, 
which gives a crystalline benzoate with benzoyl chloride, 
melting at 67 C. Acetylation of a small portion of this 
residue also indicates the presence of a small amount of an 
alcohol resembling geraniol or citronellol, but this requires 
confirmation. 
From colour reactions obtained with bromine and with 
hydrochloric acid, there is also evidence of the presence of 
small amounts of aromadendrene. 
The oil of this Leptospermum is therefore quite distinctive 
in character, and differs from that of any other species of 
Leptospermum so far recorded. 
This work has been carried out inthe Research Labor- 
atory of Messrs. Gillard Gordon Ltd., Sydney, and our 
thanks are due to this firm for their courtesy in this matter. 
