13Y R. T, BAKER. 297 



worked, and exceedingly strong, being well adapted for weather- 

 boards, fencing, wheelwrights' work, railway sleepers, rough 

 carpentry, and bridges. I saw in the neighbourhood of Mudgee 

 several bridges which had been constructed of Slaty G-um, and, 

 as they had stood for many years without any apparent decay, 

 there was certainly a good proof that the wood bears exposure to 

 all weathers." (Rev. Dr. W. Woolls). 



Oil. — The yield of oil is poor, averaging only -172 per cent. Its 

 specific gravity is '9414 at 15° C. This oil is a remarkable one 

 and distinctly different from any other Eucalypt oil yet distilled 

 at this Museum. It contains no eucalyptol, but a fair percentage 

 of phellandrene is present. The principal constituent appears to 

 be a sesquiterpene. Although at present apparently useless for 

 commercial purposes, yet it has great scientific interest, and further 

 inquiries are now being undertaken respecting it. 



Kino. — This exudation gives a turbid solution in cold water, 

 and it was found to contain eudesmin but not aromadendrin. 

 The anthers opening by pores point to the fact that Eucalypts 

 having these anthers do not necessarily exude a kino free from 

 eudesmin and aromadendron, or, in other words, may give turbid 

 kinos. Fresh material and some that had been in the Museum 

 for 10 years gave exactly the same chemical results (H. G. Smith). 



Pathological Note. — A remarkable entomological feature in 

 connection with this species is perhaps worthy of note. At 

 certain seasons of the year the leaves of this tree alone ai'e 

 aSected by a species of Psylla; the insects eat off the cuticle of the 

 leaves, giving the whole country side an appearance in the dis- 

 tance as if a Ijush fire had passed over it. 



The species is named after Mr. James Dawson, L.S., of Ryl- 

 stone, who was the first to draw my attention to the qualities of 

 the timber of this species, and who aided me in procuring botanical 

 and other material for its diagnosis. 



Hah. — Ridges on the watershed of the Goulburn Reiver, (R.T.B.) 

 across the main " Divide " at Cassilis and north-west to Pillaga 

 (Prof. Warren). 



