EUCALYPTUS GLOBULUS. 



2, as soluble in ammoniar-liquid : Eucalyptus-red in a state of decomposition or some 

 allied substance. 



3, as insoluble after drying in water, in ammonia liquid and in acids : Silica. 



The simjily aqueous solution further contained as not precipitable by lead-salts : Eucalyptin, 

 soluble in ether ; but it showed no saccharine contents nor alkaloids. 



The matter soluble in boiling diluted hydrochloric acid consisted of lime-salts, while that 

 soluble in boiling diluted soda-ley proved to be : 



1, Silica, as insoluble in alcohol ; 



2, Eucalypto-retic acid, soluble in alcohol and ether, but not in ammonia-liquid ; fusible 

 at about 352° F. ; resinous in appearance, without very perceptible odor or taste. Besides 

 as soluble in weak alcohol a brown indifferent substance, possibly a decomposition-product, 

 was obtained. 



Our phytochemical qualitative analysis of the leaves of B. globulus gave as results : 



Eucalypto-gallic acid, differing from gallic acid already by its easier solubility in cold 

 water (in 34 instead of 100 parts) ; changed by sublimation into pyro-gallic acid. 



Eucalypto-tannic acid, being brown, amorphous, of styptic taste, precipitates glue, is 

 precipitated by the tartrate of antimony and potash and by chloride of iron with dark-green 

 color and by concentrated sulphuric acid, not decomposed on boiling with diluted sulphuric 

 acid. 



Eucalyptoic acid, bitter yellowish substance, intermixed with spherical or hexagonal 

 crystals and tablets ; turns yellow with • ammonia, light-pink with lime-water ; reduces 

 alkaline tartrate of copper after boiling with diluted sulphuric acid. 



Eucalyptin, light-brown amorphous substance, soft, very bitter, inodorous, soluble in 

 77 parts of cold water, to a greater extent in hot water, in still greater quantity in alcohol, 

 not precij)itable by tannic acid or other re-agents for alkaloids ; does not reduce alkaline 

 tartrate of copper on boiling ; not affected by cold diluted sulphuric acid or other acids, 

 but evolves on boiling with sulphuric acid a peculiar odor and then the solution becomes 

 turbid. 



Gum and Saccharine substance, the latter allied to laeva-glucose and melitose. 



Inorganic Salts. 



The volatile oil, which occurs in the leaves of E. globulus, (not fully one per cent.) is 

 here left out of consideration. 



Notes on the microscopic anatomy of the leaves, accompanied by a drawing, are given already 

 along with those on E. jjtychocarpa in this work. 



Explanation of Analytic Details. — 1, outer lid ; 2, unexpanded flower, the inner lid lifted ; 3, longitudinal 

 section of unexpanded flower ; 4 and 5, front- and back-view of anthers with part of their filament ; 6, style with 

 stigma ; 7 and 8, transverse and longitudinal section of fruit ; 9 and 10, fertile and sterile seeds ; 11, embryo in 

 situ ; 12, embryo uncoiled ; 13, transverse section of embryo ; all magnified, but to various extent. 



Anatomic Plate. — 1, tangential section of portion of middle-bark (A) and inner-bark (B) ; 2, radial section of 

 a portion of middle-bark (A) and inner-bark (B) ; 3, transverse section of a portion of inner-bark ; 4, transverse 

 section of a portion of middle-bark ; — b, bast-fibre ; c, eork-cells ; ii, crystal-ceUs ; m, medullary rays ; p, bast- 

 parenchyma ; s, stone-cells ; — diametric augmentation 214 times. 



