321 



The tetrabromide was formed in the usual way with the Erai tion distil 

 .it 175 177, and when purified melted a1 i"i [05 I It thus appears thai the 

 terpene present in the oil ol this Eucalyptus was almosl entirelj laevo-rotatorj 

 limonene, and thai ovei 60 per 1 enl ol the oil consisted "I thai substam e. 



\n aldehyde determination on the crude oil, usin at. solution 



of sodium bisulphit on 1 qua! to 16 li of 1 itral. This 



aldehyd< when purified formed the characterise naphthocinchoninic acid by 

 Doebner's reaction, the producl melting a1 [98 C. 



The non-aldehydic oil, which was quite aromatic, had a secondarj odoui 

 ni geraniol. It had specific gravity at 15 ('. = 0-8710; rotation a l6-8°; 

 1 efractive index at 20° — i- (.802. 



The saponification number for die estei and free acid in the non aldehydic 

 oil was 28-3, or 9-9 per cent, of ester, if calculated a.-- geranyl-acetate, equal to 

 8- J per cent, in the original oil. 



A portion id' the non-aldehydii <>il was acetylated in the usual way, when 

 the saponification number had risen to 78-5, representing 13-8 per cent, free 

 alcohol, calculated as geraniol, or 1 v6 per cent, on die original oil. 



The results oi this investigation were originally published in die Phar- 

 maceutical Journal, London March. 1906. 



172. Eucalyptus patentinervis. 



(R.T.B., Proc. Linn. Sec, N.S.W., 1S99, p. 602, t. XLV.) 

 Half Mahogany. 



Systematic. —A good-sized nee, as far as seen, with a. bark similar to 

 thai oi some species ol Pine , Ultimate branchlecs angular. Abnormal lea. 

 ovate, shortly acuminate, lanceolate, thin, almost membraneous, petiole slender, 

 from 1 to _' inches long; venation prominent, intramarginal vein removed from 

 the edge. Normal leaves lanceolate-falcate, coriaceous, acuminate, almost 1 

 fool long m some cases, not shining, colour uniform on both sides, petiole rather 

 slender, channelled above; venation very distinct in the coast trees, but finer in 

 die inland ones, lateral veins verj prominent and spreading, curved, numerous, 

 die intramarginal vein removed from the edge. Peduncles axillary, about 1 

 inch long, flattened, bearing about ten fairly large flowers. Calyx tube occa- 

 sionally angular, 6 line- long; operculum about as long as the calyx, conical, 

 sometimes concave below the summit. 



Fruit.— Large, hemispherical, to pyriform, on a 



pedicel of about | lines in length ; rim quite 



1 line broad; valves prominently exserted, 



1 'Mte or oc( asionallj obtuse as depicted , 



nearly 3 lines long, ] lines in diameter. 



ry much like 'in enlarged form of E. resini- 

 but nunc bell shaped. 



Habitat. Ballina, Bungwahl, Bel] . Milton, ^.shfield, S: 



fxas, New Soul h \\ ales, 



