114 R. T. BAKER AND H. G. SMITH. 



No. 2. Oil from leaves collected at Canterbury ; distilled 23rd 

 July, 1897. Identical in appearance and odour to that of No. 1 ; 

 yield 0*795 per cent., or 100 lbs. of leaves with branchlets gave 

 12| ounces of oil; specific gravity as obtained = 0*907 at 22° O. ; 

 the specific rotation was + 5-246°. This oil was not redistilled. 



Eucalyptol in the crude oil = 28-4 per cent. 



It will be seen that the yield of oil from this species is good ; 

 the greater portion had redistilled (No. 1) below 183° C. This oil 

 does not contain phellandrene. It appears to contain no other 

 constituent having special interest. By referring to the table, it 

 will be seen that this oil contained a larger percentage distilling 

 at a lower temperature than either the oils of E. macrorhyncha or 

 E. capitellata. The constituents of E. eugenioides boiling at and 

 below 174*5° C. equalled 38 per cent., whereas the most obtained 

 from E. macrorhyncha was 8 per cent, and of E. capitellata 22 per 

 cent. The exudations or kinos of these three Stringybarks are 

 identical in composition, and contain neither gum, like the Iron- 

 barks, nor eudesmin or aromadendrin like the Boxes, etc. 



In reference to the tables, we wish it to be distinctly under- 

 stood that the results therein given refer only to oils investigated 

 within three months after distillation, as we have found that 

 Eucalyptus oils alter in composition when kept in their crude 

 condition. Experiments are now being carried on to investigate 

 these alterations and the results will be made known when the 

 investigation shall have been completed. 



This table gives the results of the redistillations of the oils of 

 the three species of Eucalypts. The numbers are those given to 

 the oils of the several species in the paper. The temperatures 

 are corrected. The results are percentages obtained from one 

 temperature to another, ignoring the first two or three per cent, 

 that came over before regular distillation commenced. The {a) 

 denotes the temperature where the second fraction commenced, 

 the (b) the same for the third fraction, and (c) the commencement 

 of the fourth fraction. 



