66 



On rectification, 2 per rent, distilled below 162° C. corr.). Between 

 [62 1 ;_' . 71 per cent, distilled; between 172-193°, 20 per cent, came over; 

 and between i< 2 per cent, distilled. The two first fractions gave the 



fi .llou ing results : — 



First fraction, sp. gr. at 15° C. = o-888o; rotation a D + 21-2°. 

 Second ,. ,, ., = 0-9083; ,. a D + 97°. 



rhe cineol was determined by the phosphoric acid method in the portion 

 distilling below 193°. The result was 31 per cent., indicating about 28 per cent. 

 in the original oil ( ).M. 



The above sample was stored in the dark, and in December, 191c), was 

 again analysed. Very little alteration had taken place during the twenty years 

 the oil had been kept. 90 per cent, distilled below 193°. The crude oil and the 

 rectified portion gave the following results : — 



Crude oil, sp. gr. at 15 C. = 0-8983; rotation a a + 18-5° 



at 20 = 1-4643. 

 Rectified portion ,, = 0-8920; rotation a + 19-2° 



at 20 = 1-4619. 



The cineol was determined by the resorcinol method in the portion 

 distilling below 193 . When calculated for the original oil the result was 42 per 

 cent. By the rapid phosphoric acid method it was 35 per cent, when calculated 

 for the crude oil. 



refractive index 

 refractive index 



25. Eucalyptus santalifolia. 



(F.v.M., in Trans. Vic. Inst., i, 35, 1855.) 

 White Mallee. 



Systematic. — Tall shrub, bark greyish, smooth. Normal leaves scattered, 

 thick, narrow, rarely broad, lanceolate, usually falcate, average about 4+ inches 

 long by J inch broad, marginal vein well removed from the edge, venation 

 oblique. Oil glands numerous, but not prominent. Petioles angular. Buds 

 almost sessile, in axillary umbels of usually three to five, common peduncle, up 

 to 4 lines long. Calyx tube nearly hemispherical, turbinate, slightly shorter 

 than the conical operculum. 



Fruit.— Hemispherical, turbinate; rim broad, trun- 

 cate to domed; valves scarcely exserted; 

 about 5 hues in diameter. 



The average domed fruit much resembles E. macror- 

 hyncha, but is larger. The truncate and larger form 

 is not unlike that of E resinifera. 



Habitat.— Victoria, South Australia, Western Australia, 



REMARKS. Mueller, in his " Eucalyptographia," discards the name of E. divcrsifolia bestowed on this 

 species by Bonpland. in favour of E. santalifolia, stating that the material described under that name was too 

 imperfect for the specific classification, a determination upon which we agree, as in these days of exact science it 

 is essential that there should be no doubt upon which the chemical data are based, and so we prefer not to accept 

 Bonpland 's nomenclature ; Maiden however, accepts it in his "Critical Revision," Vol. I, p. 197. Our reasons tor the 

 systematic placing of this species is more fully dealt with in our paper on South Australian Eucalypts, Roy. Soc, 

 S.A., vol. xi. p. 470. 



