5° 



REM A RKS. This specii i placed a a variety of J i bj I H Maiden " Critical Re\ 



ii i . i n w data are adva 1 to justify i1 reduction to > ;tal rank, the reason given when 



i i! ii i i i i.i ,i peel still hold and al; n gard it as a • cies. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Lismore, N.S.W., in August, [900. Qie yield of oil was 0-16 per 

 cent. The crude oil was oi a light orange-brown colour, and had a not unpleasant 



odour. It consisted largely of pinene, which was dextro-rotatory, and phel- 

 landrene was quite absent. Cineol was present, but only about 5 to 10 per cent. 

 A very pronounced constituent occurring in this oil was the ester terpinyl-acetate. 

 ( )nly a small quantity of free acetic acid was present in the crude oil, but the ester 

 was partly decomposed on distilling the oil under atmospheric pressure. 



The crude oil had specific gravity at 15 C. =.0-8963 ; rotation « D + 37-2° ; 

 refractive index at 20 = 1-4681, and was soluble in 7 volumes 80 per cent, 

 alcohol. The saponification number for the esters and free acid was 35-8. 



On rectification 2 per cent, came over below 162 C. (corr.). Between 

 162-172 , 53 per cent, distilled; between 172-193 , 27 per cent, distilled, and 

 between 193-270 , 16 per cent, came over. These fractions gave the following 

 results : — 



First fraction, sp. gr. at 15 C. = 0-8715; rotation «„ + ^y^°. 



Second „ ,, „ = 0-8954; ,, + 35-5°. 



Third ,, ,, ,, = 0-9121; ,, not taken. 



A second consignment; of material for distillation was received a month 

 later from Lismore, N.S.W., in order that the comparative constancy of the 

 constituents in the oils might be tested. The two samples were practically 

 identical, as is shown bv the following table : — 



Locality and date. 



Specific 

 gravity 

 at 1 5 C. 



( )pl ii al 



1 ota turn a 



Saponifi- 

 cation 

 number. 



yield of oil 



per cent. 



Lismore, 2nd August, 1900 

 Lismore, 5th September, 1900 ... 



0-8963 +37' 2 ° 



0-8901 +39'o° 



35-8 

 35-29 



o-i55 

 0169 



In January, 1902, the ester content was again determined in the crude 

 oil of the first sample in order to see what alteration, if any, had taken place 

 during that period. The free acid had increased slightly in amount, otherwise 

 the ester was constant. In the cold with two hours' contact with alcoholic 

 potash, no further alteration was shown, so that it is evident that geranyl- 

 acetate hardly occurs in the oil of this species. 



The Lismore, September, sample (supra), was stored in the dark, and in 

 December, 1919, was again analysed. Very little alteration had taken place 

 during the nineteen years the oil had been kept. On distillation 78 per cent, 

 came over below 190° C. The crude oil and the rectified portion gave the 

 following results : — 

 Crude oil, sp. gr. at 



15 C. = 0-8981; rotation rt D + 36-8°; refractive index 

 at 20 = 1-4681. 

 = 0-8790; rotation a D + 34-4°; refractive index 

 at 20 = 1-4647. 



The cineol was determined by the resorcinol method in the rectified portion ; 

 when calculated for the crude oil the result was n per cent. 



Rectified portion 



