to8 



In November, 1913, material oi this species for distillation was received 

 from ("00111,1, N.S.W. The yield oi oil was 0-52 per cent. The results agree 

 very closely with those previously obtained for the oil of this species. Phel- 

 landrene was absent, but pinene was present, and also a fair amount of cineol. 

 Crystallised eudesmol was not detected, although the liquid form was present 

 in some quantity. The crude oil had the following characters:— 



Specific gravity at 15 C. = 0-9243; rotation a D + 9-8°; refractive index 

 at 20 C. — 1-4683, and was soluble in i+ volumes 70 per cent, alcohol. 



The cineol was determined by the phosphoric acid method; the result 

 was 45 per cent. 



The high-boiling dextro-rotatory alcohol. — Crystallised eudesmol has not at 

 any time been detected in the oil of this species under ordinary conditions, but 

 efforts to determine the identity of the alcohol resulted in the reversion of the 

 liquid to the crvstallised form. The mixed oil of this species, which had 

 been stored for nearly twenty years, was taken for this investigation. 



The saponification number for the oil was 6-13 ; after acetylation, it was 



38-55. This result is equal to 13 per cent of free alcohol considered as C I5 H 25 OH. 



800 c.c. of the crude oil gave 160 c.c. boiling above 192 C, equal to 20 



per cent. ; 157 c.c. of the high-boiling portion when distilled under reduced 



pressure, gave the following fractions : — 



Between 78-134° C. at 6 millimetres, 58 c.c. distilled. 

 134-150 C. ,, ,, ■ 34 c.c. „ 



150-166° C. ,, ,, 37 c.c. 



The last two fractions gave the following results : — 

 No. 2 fraction, sp. gr. at 15 C. = 0-957 ; rotation « D + 9-0° ; refractive 



index at 20 = 1-4950. 

 No. 3 ,, ,, ,, = 0-972; rotation a D + 19-6°; refractive 



index at 20 = 1-5150. 

 Fraction No. 2, on standing about fourteen days, formed a buttery-like 

 mass, and had commenced to crystallise. Fraction No. 3 commenced to crystal- 

 lise after standing overnight, and eventually became wholly crystalline. 



Both fractions were then utilised for the preparation of the pure eudesmol. 

 The melting point of this was 79-80 C, and in a 12 per cent, chloroform solution, 

 gave specific rotation [a] D + 33-58°. 



See also the article on eudesmol in this work, where the properties and 

 peculiarities of this interesting substance are dealt with. 



54, Eucalyptus salmonophloia. 



(F.v.M., in Fragm. xi, II, 1878.) 

 Salmon-coloured Gum. 



Systematic. — A tree when aged, reaching 100 feet in height, the bark 

 smooth, grey, and somewhat purplish, of an oily lustre. Abnormal leaves ovate 

 to ovate-lanceolate, dull on both sides. Normal leaves narrow-lanceolate, 

 acuminate, falcate, 3 inches long, shining on either side; venation very indistinct, 

 intramarginal vein scarcely removed from the edge, lateral veins spreading, 



