134 



strongly dextro-rotatory. It may be assumed, therefore, that botli forms of 

 limonene occur in the oil of this species, and that the dextro-rotatorj- form always 

 predominates. 



The fourth fraction was saponified, and from the separated oil pure borneol 

 was prepared. The acids of the esters were not "determined, as this had been 

 done in the previous sample. 



No. 3. — This material was collected at Trangie, 320 miles west of Sydney, 

 New South Wales, 28th November, 1902. The leaves were very dr\- at this time, 

 as the State was suffering from a serious drouglit. This dryness does not, how- 

 ever, seem to interfere either with the yield of oil or with its constituents, and 472 lb. 

 of material gave 46 oz. oil, = o-6i per cent. The rotation of the crude oil Ui, = + 30-8° ; 

 specific gravity at f|° C. = 0-8631 ; refractive index =1-4755 at 20° C. ; saponi- 

 fication number 36-46, equal to 12-76 per cent, ester. The freshly distilled 

 oil was soluble in two volumes go per cent, alcohol. A portion of the oil was 

 acetylated b}' boiling with acetic anh3'dride and sodium acetate in the usual way. 

 The saponification number was then 52-09, equal to 18-23 P^r cent, ester. The 

 free alcohol present was therefore 4-8 per cent, as borneol. On redistilling, 27 per 

 cent, came over below 160° C. ; 37 per cent, between 160 and 165° C; 16 per 

 cent, between 160-180° C. ; and 12 per cent, between 180-225° C. 



The specific gravit}- at 24° C. first fraction = 0-8477 ; of the second, 0-8494 ; 

 of the third, 0-8561 ; of the fourth, 0-9256. The rotation of the first fraction 

 «i. = + 32-4°; of the second, -|- 31-6°; of the third, + 30-5°: of the fourth, -|- 34-2°. 

 The constituents were identical with those of the previous samples. 



No. 4. — This material was collected at ^^'ellington, 250 miles west of Sydney, 

 New South Wales, 17th March, 1903. 5831b. of branchlets gave 59^ oz. of oil 

 equal 0-635 P^"" cent. The rotation of the crude oil a„= + 28-4°; specific 

 gravity at \l° C. =0-8659; refractive index at 19° C. =1-4774; saponification 

 number 34-58 equal to 12-103 P^i" cent, ester. When treated with alcoholic potash 

 in the cold, with three hours contact, the ester value was 5-936 per cent. ; with 

 nineteen hours contact the ester value was 8-095 per cent. 



On redistilling, 27 per cent, came over below 161° C. ; 27 per cent, between 

 i6i*'-i65° C. ; 31 per cent, between i65°-200° C. ; 7 per cent, between 200°- 

 225° C. The specific gravity at 20° C, first fraction =0-8550; of the second, 

 0-8565; of the third, 0-8664; of the fourth, 09416. The rotation of the first 

 fraction «„ = + 30-5° ; of the second, -|- 29-3° ;. of the third, + 27-2° ; of the fourth, 

 + 32-0. The constituents of this oil were idrnliral with those of the other 

 samples. 



No. 5. —This material was collected at Bylong, 240 miles west of Sydney, 

 New South Wales, 2nd -May, 1903. 511 lb. of branchlets gave 46^ oz. of oil 



