BY R. T. 15AKEU. 601 



It contains no phellandrene, but a small quantity of dextrorota- 

 tory pinene is present. The rectified oil (fraction representing 

 87 per cent, of crude oil) contained 45-5 per cent, eucalyptol, 

 rather less than should be demanded in a good Eucalyptus oil, as 

 myself and colleague have suggested 48 per cent, of eucalyptol as 

 the minimum allowable in oils used medicinally (see recommenda- 

 tions by the New South "Wales committee appointed to deal with 

 the addendum to the British Pharinacopceia). The specific 

 gravity of the crude oil at 15° C. = "9858. The specific gravity 

 of the rectified oil at 15° C. = -9075. The sjsecific rotation of the 

 crude oil = [a] ]3 + 3-66. The specific rotation of the rectified 

 oil = [a] D + 3-31; 92 per cent, of the crude oil distilled below 

 185° C. (H. G. Smith). 



Mr. W. Biiuerlen, who is familiar with E. hct)aa,stoina, Sm., 

 and E. maculosa in the field, states "that there can be no doubt 

 about their being distinct species, although there is so much 

 similarity in the leaves and sometimes also in the general aspect 

 that sometimes under certain conditions it is rather difficult to 

 distinguish them. On comparison, however, one finds buds and 

 fruits quite different, so much so that I only need speak of the 

 trees as they appear in the field under certain conditions. Under 

 such conditions E. hcemastorna, Sm., is all round the larger of the 

 two, attaining a diameter of 2-5 feet, sometimes the butt bulging 

 enormously near the ground; if anything it is more crooked than 

 E. maculosa usually is, the trunk not being by far so spotted as 

 E. macidosa, and always quite different in colour; this holds 

 invariably from the youngest saplings, or even seedlings, to the 

 oldest trees. The trunks of E. maculosa are always bluish with 

 dark grey spots, or sometimes reddish or greenish spots, and always 

 dull coloured, while the trunks of E. hcBmastoma are always of a 

 creamy colour, often, especiall}^ in the limbs, approaching quite 

 white, V)ut not dull or chalky; they have the appearance as if 

 the}', were rubbed over with soap. 



" Both trees are smooth to the very ground, but the difference 

 of colour on the trunk never misled me in one instance. The 

 foliage of E. maculosa is ahvavs more bluish, and the leaves more 

 39 



