.-ago EUCAL YPTUS. 



of E. microcorys, F. v. M. (Tallow Wood) contains Cineol, has a sp. gr. 

 of .935, and boils between 160 and 200 .f Staiger states that the leaves 

 yield about 2 per cent, of oil, and I certainly think that this is a species 

 which should be carefully tried by the distiller. E. odorato, Behr (sp. gr. 

 .907), containing Cuminol in addition to Cineol, should also be tried. 

 Schimmel also states that E. populifolia, Hook, contains " a fair propor- 

 tion of Cineol. I have recently examined the oil E. pulverulenta (Ar- 

 gyle Apple), which has not been previously described. It is of a bright 

 green color, like Cajeput, has a specific gravity of .9145 at 23 degs. C, 

 gives excellent results for Cineol, and shows only the slightest indica- 

 tions of Phellandrene. When re-distilled, aldehydes commence to come 

 over at no deg. C. and between this and 171 deg. C., when the tempera- 

 ture becomes stationary, 10 per cent, has distilled over. An additional 

 .85 per cent, comes over between 171 degs. and 195 degs. This distillate is 

 .a very good oil, only showing a slight tinge of green, is rich in Cineol 

 and almost free from Phellandrene. It has a sp. gr. of .912 at 25 degs. 

 vC. This oil is very full of promise, and I intend to further examine it. 



*Bericbt, April, 1893, p. 38. 

 t/6., Oct. 1893, p. 21. 



'Schimmel has examined the oil of E. rostrata, Schlecht.* (Murray 

 red gum). Its sp. gr. at 15 degs. C. is .924, and optical rotation 12 58'. 

 Besides Cineol, it contains valeraldehyde. This species is worthy of 

 proper practical tests. The same firm, however, find no Cineol in a 

 Queensland sample of E. tereticornis oil. If this be confirmed it will be 

 remarkable, considering the close botanical affinity of this and the pre- 

 ceding species. 



**BmV6f,Oct. 1893, p. 21. 



For practical purposes it is convenient to deal with the mallee oils 

 separately. The vegetation of Kangaroo Island, South Australia, is 

 mainly composed of a mallee the ' 'narrow-leaf peppermint" (E. cneori- 

 folia] and it yields an oil of high specific gravity and Cineol percent- 

 age, and contains little or no aldehyde. The oil of E. dumosa is also 

 valuable. That of E. oleosa has been examined by Schimmel,* who pro- 

 nounces it to contain both Cineol and Cuminol. Its sp. gr. at 15 deg. C. 

 is .915 to .925, and optical rotation 3 deg. and 5 deg., Wilkinson. 



Bericht, Oct., 1893, p. 21. 



The term oleosa has, however, been sometimes used in a generic 

 sense, and hence we cannot always guarantee that the oils labeled "ole- 

 osa " are the sole product of E. oleosa, F. v. M. There are other species 

 of Mallee, but as some confusion has arisen in regard to their various 

 products a monograph of Mallee oils would be invaluable. 



Under the head of " Scented or Perfume Oils," that of E. macttlata, 



