107 



REMARKS. This species is very constant in its specific rh.irnrlrr throughout its geographical distribution, 

 and shows no disposition to variation. Mueller synonymised it with /;. hifiiui^tniiin. Sin., ;is a variety, but it only 

 resembles that species in the shape of the fruit. The leaves, fruits, oil, and timber easily distinguish it from E. 

 hssmastoma of Smith. This is not /:. hirinastonia. var. micraxtha which is a true varietal form of the species. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation \\ere 

 obtained from Cow Flat, Bathurst, N.S.W., in March, 1901. The yield of oil 

 was 0-72 per cent. The crude oil was of a dark amber colour ; and had an odour 

 reminding of peppermint, although piperitone could only be present in very small 

 quantity. It was fairly rich in cineol ; pinene was present, but phellandrene 

 not detected. The presence of a high boiling constituent which had a high 

 rotation to the right was well shown ; this is the liquid form of eudesmol. The 

 oil of this species differed greatly from that of E. hcemastoma, of Smith, the 

 " Scribbly Gum " of the coast, and also from that of " Scribbly Gum " growing 

 around Lawson, and other places on the Blue Mountains, N.S.W. 



The crude oil had specific gravity at 15 C. = 0-9215 ; rotation a t , + 7-2; 

 refractive index at 20 = 1-4684, and was soluble in i volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 7-95. 



On rectification, about i per cent, of acid water and volatile aldehydes 

 came over below 165 C. (corr.). Between 165-183, 69 per cent, distilled; 

 between 183-233, 14 per cent, came over, and between 233-280, n per cent, 

 distilled. These fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-9108; rotation a n + 4-8. 



Second ,, ,, ,, = 0-9170; ,, + 4-3. 



Third ,, ,, ,, =0-9499; ,, +19-2. 



The cineol determined in the first fraction by the phosphoric acid method 

 was 49 per cent. (O.M.), indicating about 40 per cent, in the crude oil. 



Material of this species had previously been sent from Bungendore, N.S.W., 

 in March, 1899. The oils were practically identical in every respect, with the 

 exception that a little more pinene was present. The specific gravity of the crude 

 oil at 15 was 0-9168. Below 183, 78 per cent, distilled; between 183-240, 

 9 per cent., and between 240-280, 7 per cent. The crude oil was soluble in 

 ij volumes 70 per cent, alcohol. The fractions gave the following results: 



First fraction, sp. gr. at 15 C. = 0-9096; rotation + 5-6. 



Second ,, ,, ,, =0-9205; ,, + 3-8. 



Third = 0-9492; ,, + 18-7. 



The cineol determined in the large fraction by the phosphoric acid 

 method was 52 per cent. (O.M.), indicating about 42 per cent, in the crude oil. 



On the completion of the analyses, the two oils were mixed and stored 

 in the dark. In August, 1919, the sample was again analysed. After twenty years 

 but little alteration was observed in the oil of this species ; and on rectification, 

 80 per cent, distilled below 190 C. The results with the crude and rectified oils 

 were as follow : 



Crude oil, sp. gr. at 15 C. = 0-9205; rotation a n + 7-5; refractive index 



at 20 = 1-4677. 

 Large fraction ,, ,, = 0-9126; rotation a n + 5-7; refractive index 



at 20 = 1-4610. 



The cineol was determined by the resorcinol method in the large fraction 

 and calculated for the crude oil; the result was 64 per cent. By the phos- 

 phoric acid method it was 55 per cent. 



