115 



respect the oils of the two species differ. It is remarkable, however, how closely 

 the oils of C. propinqua and C. glcmca agree in all their characters, with the above 

 exception. As the constituents of the oil of this species are almost identical with 

 those of C. glMica, the same remarks will apply to the oils of both species (see, for 

 further details, under C. glauca). 



The specific gravity of the crude oil at il" C. =0-8662; rotation a^ 

 = +32-4°; refractive index at 19° C. =1-4752. After boiling with alcoholic 

 potash, the saponification number of the crude oil was 34-88, equal to 12-2 per 

 cent, of esters. In the cold with three hours contact, the saponification number 

 was 25-27, equal to 8-84 per cent, ester. 



On redistillation practically nothing came over below 155° C. Between 

 155° and 160°, 29 per cent, distilled; between 160° and 165°, 32 per cent.; 

 between 165° and 200°, 23 per cent.; between 200° and 225°, 8 per cent. 



The specific gravity of the first fraction at ff ° C. = 0-8539 ; of the second, 



0-8509; of the third, 0-858; of the fourth, 0-9405. The rotation of the first 



fraction flu = + 31-9°; of the second, + 32-6° ; of the third, + 35-3°; of the fourth, 



+ 36-2°. The refractive index at 21° C. of the first fraction was 1-4738; of the 



second, 1-4738; of the third, 1-4744; of the fourth, 1-4733. 



No. 2. — Mr. Gill also forwarded to us this material. As there were con- 

 siderable fruits upon it, it was thought advisable to distil it, and the following 

 resiilts were obtained. In appearance and odour the oil resembled that distilled 

 from the leaves alone ; it had a little less rotation to the right than had the leaf 

 oil, thus indicating that the oil from the fruits of this species has a different 

 rotation to that of the leaves. In this respect it agrees with the results obtained 

 with allied species. The ester content was also a little less, as was also to be 

 expected. In every other respect the oils agree. 72 lb. of branchlets with fruits 

 gave 3I oz. of oil, equal to 0-326 per cent. The specific gravity of the crude oil 

 at xy° C. = 0-8709; rotation, a-o — +20-5°; refractive index at 19° C. = 1-4749. 

 The saponification number was 32-24, equal to 11-29 P^^ cent, of esters. 



Crude Oil from the Leaves of Callitris propinqua. 



No 



without 

 fruits. 



Locality and 

 Date. 



Specific 

 Gravity " C. 



South 



Austraha, 



i8/5''o5 



0-8662 

 @i9 



Rotation a^ 



Relractive 

 Index ° C. 



Ester, per 

 cent, by 

 boiling. 



Ester, per 



cent, in the 



cold. 



+ 32-4 



1-4752 

 @ 19 



12-2 



Yield, 

 per cent. 



0.41 



2, 



with 

 fruits. 



Do. 



March, '05 



0-8709 

 (a), 20 



+ 20-5 



1-4749 

 @ 19 



0-326 



