20t 



with all our samples of oil from C. glauca. The saponification number was 133- i, 

 equal to 46-8 per cent, of ester, as bornyl- and geranyl-acetates. In the cold, with 

 two hours' contact, the saponification number was ii2-6, equal to 39-4 per cent. 

 of ester. This result indicates the presence of a large percentage of geranyl-acetate. 

 When redistilled, practically nothing came over below 156° C; between 156° and 

 170°, 19 per cent, distilled; between 170° and 180°, 16 per cent.; between 180° 

 and 200°, II per cent. ; between 200° and 240°, 47 per cent. The specific gravity 

 of the first fraction at \j° C. = 0-8514 ; of the second, 0-8566 ; of the third, 0-8662 ; 

 of the fourth, 0-9249. The rotation of the first fraction a^ = + 13-8°; of the 

 second, + 8-7°; of the third, +3-9°; of the fourth, +13-6°. As both borneol 

 and acetic acid were isolated and determined, it may be assumed that the higher 

 rotation of the fourth fraction was mostly due to the presence of the dextro-rotatory 

 bornyl-acetate, which is so pronounced a constituent in the oil of C. glauca. The 

 principal ester in the oil of C. calcarata is, however, geranyl-acetate. 



The volatile acids of the esters were separated by boiling the oil with aqueous 

 soda until the saponification was complete, separating the aqueous portion, dis- 

 tilling over the acids, acidifying with sulphuric acid, forming their barium salts, 

 and determining these, by ignition with sulphuric acid. The mean of three deter- 

 minations gave 90-92 per cent, barium sulphate. It is probable that butyric acid 

 was present in small amount, as this acid was indicated, so that the salt contained 

 97-39 per cent, barium acetate, and 2-61 per cent, barium butyrate. 



Both borneol and geraniol were separated from the product of saponification, 

 and their identity determined. The geraniol was oxidised to citral, and this, 

 after being isolated, was determined by Doebner's method. 



No. 2. — This material was collected at Bylong, New South Wales, 240 miles 

 west of Sydney, on the 29th April, 1903. The terminal branchlets with fruits were 

 steam distilled for six hours in the usual way. The amount of oil obtained from 

 560 lb. of material was 14^^ oz.", equal to 0-162 per cent. The crude oil was identical 

 in colour and odour with that chstilled from the Wellington sample. The rotation 

 of the crude oil was a^ = -|- 14-1°; specific gravity at 19° C. = 0-8861 ; refractive 

 index at 19° C. = 1-4760; saponification number was 118-09, equal to 41-33 per 

 cent, ester. Saponification in the cold, with two hours' contact, gave S.N. 

 77-38, equal to 27-08 per cent, ester; with eighteen hours' contact the S.N. 

 109-9, equal to 38-46 per cent. After keeping the oil for some time the solubihty 

 in alcohol had diminished somewhat, but in tliis respect it was identical with the 

 Wellington sample, as it was soluble in an equal volume of 80 per cent, alcohol, 

 but became turbid with two volumes. There was no deposition of resin on the bottle 

 on keeping, as takes place with the oils of some other species of CalUtris. When 

 redistilled, nothing came over below 156° C. ; between 156° and 170°, 24 per cent, 

 distilled; between 170° and 180°, 23 per cent. ; between 180° and 200°, 7 per cent, 

 between 200° and 225°, 37 per cent. The specific gravity of the first fraction at 



