129 



The crude oil had specific gravity at 15 C. = 0-9285 ; rotation a D + 6-7 ; 

 refractive index at 20 = 1-4717, and "was soluble in i-i volume 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 4-6, and in 

 the cold with two hours' contact 3-6. 



On rectification 2 per cent, distilled below 172 C. (corr.). Between 

 172-193, 64 per cent, distilled; between 193-275, 9-5 per cent, came over, and 

 between 275-294, 21 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp.gr. at 15 C. = 0-9169; rotation a D + 3-75 ; refractive index 



at 20 = 1-4619. 

 Second ,, = 0-9251; rotation a D + 3-8; refractive index 



at 20 = 1-4700. 

 Third ,, ,, = 0-9582 ; rotation not taken ; refractive index 



at 20 = 1-5030. 



The cineol was determined by the resorcinol method in the first fraction ; 

 the result was 56 per cent, when calculated for the crude oil. By the rapid phos- 

 phoric acid method it was 46 per cent, when calculated for the crude oil. 



A portion of the oil was acetylated in the usual way ; the saponification 

 number had then risen to 67-2, and in the cold with two hours' contact it was 

 19-7. This result indicated that 19 per cent, of eudesmol and 4-4 per cent, of 

 geraniol were present in the free condition. The eudesmol was purified, when 

 it melted at 80 C., and in chloroform at 24 C., had specific rotation 

 [*] + 33-65. 



68. Eucalyptus platypus. 



(Hook., Ic. PI. t. 849, 1852.) 



Systematic. A small tree with a smooth bark. Abnormal leaves ovate 

 or obcordate. Normal leaves broadly ovate or orbicular, often crenate, mostly 

 under 2 inches long, thick, smooth and shining ; venation not prominent. 

 Peduncles axillary, thick, woody, flat, up to 6 lines broad and 2 inches long; 

 bearing about five to twelve flowers. Calyx tube 3 to 4 lines long, narrow 

 turbinate, sometimes ridged, sessile; operculum conical, obtuse, much longer 

 and narrower than the calyx tube. 



Fruit. Crowded in heads, semi-ovoid 

 or turbinate, slightly contracted 

 at the orifice, ribbed; rim thick 

 and slightly convex ; valves often 

 acuminate, exserted ; 6 to 9 lines 

 long, 4 to 7 lines in diameter. 



This clustering of fruits occurs also in 

 E. Lehmanni and E. cornuta, but these 

 litter are easilv distinguished from this 

 Eucalypt by their elongated valves. 



Habitat. Western Australia. 



