302 



pinene, but the dextrorotatory form only slightly predominates, and consequently the large fraction of 

 rectified oil does not vary but slightly in optical properties from that of the crude oil. This is contrary 

 to the general experience with oils of the eucalyptol class, as in those the dextrorotatory pinene generally 

 predominates. There are only a few species which give an oil, the rectified portion of which has a less 

 dextrorotatory than the crude oil ; E. dealbata is one of the species having this peculiarity as well as 

 E. Behriana, E. maculosa, and a few others. No phellandrene could be detected. A small amount of 

 the lower boiling aldehydes was present ; the odour indicated that butaldehyde and valeraldehyde were 

 present, thus following the general rule. The crude oil in appearance and other characteristics resembles 

 those of this group generally, and the recified oil is slightly tinted yellow. ... Of the most closely 

 allied oils it more nearly approaches E. dealbata than that of any other species which has yet been 

 investigated, although the resemblance between it and the oil of E. Behriana is also strongly marked. 



Being a Mallee, it was thought that it might contain a considerable amount of calcium oxalate in 

 the bark. The green bark taken from small sticks had a thickness of 1 to 2 millimetres ; it was found 

 to contain 3-85 per cent, of calcium oxalate. The amount of calcium oxalate in the bark of the largest 

 piece having a diameter of 3 inches was 5-39 per cent. The crystals in the bark of this species differ in 

 no respects from those of Eucalyptus barks generally (see paper with plate by H. G. Smith in J own. Boy. 

 ■Soc. N.S.W., xxxix, 23, 1905). The amount of lime in the bark of E. dealbata was 1-19 per cent. 



