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



gave 48 -2 per cent. The determination of the eucalyptol in the 

 crude oil was found to be as unsatisfactory as in the case of the 

 crude oil from Ilford. The fraction distilling between 185 -9° and 

 193-2° equalled 8 per cent., and had a specific rotation +1*54° 

 and a specific gravity 0*911 at 18°, it contained a small quantity 

 of an ester like the fraction obtained from the oil from Ilford. 

 The portion requiring a higher temperature than 193 2° for dis- 

 tillation equalled 31 per cent, and contained about the same 

 amount of eudesmol in this portion as was found to be present in 

 the corresponding portion of the No. 1 oil from Ilford. It is thus 

 seen that oils from different localities from the same species of 

 Eucalyptus, are almost identical in composition, providing they 

 are collected at the same time of the year. 



No. 3. Oil obtained by mixing together the oils from nine distil- 

 lations of leaves obtained from Ilford. Distilled at various 

 times during March 1898. The quantity of leaves of jBJ. 

 rnacrorhyncha distilled for this research was 2,238 lbs. 

 Oil light reddish-brown in colour, odour fairly pleasant ; yield 

 = 0287 per cent., (mean of the nine distillations), or 100 lbs. of 

 leaves with branchlets gave four and a half ounces of oil ; specific 

 gravity as obtained = 0-927 at 18°. The redistillation of 100 cc. 

 was done at ordinary atmospheric pressure, only a few drops, 

 besides the usual water which was acid, coming over below 169 "5°. 

 Between that and 172-4° two per cent, had distilled, at which 

 temperature regular distillation commenced. (See tabulated list.) 



First fraction 23%; sp. gr. = 0-9003, specific rotation^ -1-11° 

 Second „ 32%; „ =0 9057, „ +-0° 



Third „ 11%; „ =0-911, „ +1-54° 



Fourth „ 27%; „ =0-9542. 



Eucalyptol in crude oil — no satisfactory reaction with phosphoric 

 acid. 



(a) Eucalyptol in combined first and second fractions = 52 -36% 



(b) ,, in whole fraction but stopping at 182° C. = 53*2% 

 Specific gravity of whole fraction (a) = 0-9035 at 18° C; (b) = 



09058 at 14° C. Eucalyptol in third fraction = 43-5%. 



