GENERA EUCALYPTUS AND MELALEUCA. 



23 



the following table that this oil is not inferior to any of the preceding as 

 a solvent of resinous substances. 



Table showing the Solubility op Resinous Substances at 

 Ordinary Temperatures, in Essential Oil of Melaleuca 

 ericifolia. 



Name of Resinous 

 Substance. 



Camphor 

 Mastic . 



Kauri (from New Zea- 

 land) 



Sandarac (ordinary) . 

 Grass-tree . . . . 



Anime 



SheU-lac 



Copal (Sample No. 2) 



Gutta Percha 



Number 



of ounces 



avoirdupois 



soluble in 



1 imperial 



pint. 



18-9 

 15-3 

 10-2 



87 



65 



1-02 



0-95 



0-82 



o-o 



Remarks. 



Thin limpid solution, perfectly satu- 

 rated at about 70°. 



Very soluble, forming a viscid, clear 

 solution. 



This resin dissolves with readiness ; 

 its solution is very viscid, and of 

 a pale, clear, reddish-yellow colour. 



Perfect solution, somewhat thinner 

 than the preceding, but thicker 

 than that of mastic. 



This resin is totally soluble in the 

 oil of M. ericifolia, giving rise to a 

 liquid of a very deep red colour, 

 thicker than oil. 



This resin is not totally soluble at 

 ordinary temperatures ; a little 

 more than half of the quantity 

 used was taken up to produce a 

 solution of the strength indicated. 

 The undissolved portion passes 

 into a very bulky gelatinous state. 



The portion of shell-lac which is taken 

 up by this solvent forms with it a 

 transparent, deep amber-coloured 

 fluid, of the consistence of oil ; to 

 obtain it, the resin must be used in 

 excess, and in a finely divided state. 



Gum copal is rapidly acted upon by 

 this volatile oil, but only a por- 

 tion enters into perfect solution 

 (about 56 per cent), the remainder 

 remains suspended in a very gela- 

 tinous, transparent state. 



No solvent action. 



Melaleuca Wilsonii. — The productiveness of this shrub is tolerably 

 great, bearing in mind the fact already stated, that a large portion of the 

 material weighed into the still consists of stems and twigs, which, 

 although they appear to contain a little oil, as is the case with all the 



