88 A. R. PENFOLD AND F. R. MORRISON. 
determined to date, anticipating to find later in our research 
an oil yielding it in greater quantity to enable a more 
thorough investigation to be undertaken. 
It is volatilised with difficulty in steam, and is, therefore, 
usually obtained at the termination of the distillation of 
the oil from the leaves and terminal branchlets in much 
the same way as eudesmol. If present in very small 
amount in the oil it is found concentrated in the residue 
after rectification. 
Properties of the Stearoptene. 
The crude solid material obtained at the termination of 
the distillation of the leaves of Bceeckea crenulata, and from 
the residue left after rectification of the oil of Darwinia 
grandiflora was dissolved in boiling alcohol, from which it 
was obtained upon cooling in primrose-yellow needles of 
melting point 103 - 104° C. | 
It is readily soluble in hot alcohol, hot ether, acetone, 
xylene, chloroform, and benzene; moderately soluble in 
ethyl acetate, and very sparingly soluble in petroleum ether. 
By crystallisation from alcohol it is obtained in mono- 
clinic prisms. Its solution in alcohol was found to be 
optically inactive. 
The formula appears to be CisHisOz, as indicated by the 
following combustion and molecular weight results, viz:— 
1. (B) 0°1078 gram gave 0°2578 gram CO, and 0°0738 
gram H,O. O—65°22/, H—7°60%. 
2. (B) 0°1241 gram gave 0°2976 gram CO, and 0°0806 
gram H.O. O—65°4/%, H—7°227. 
. (D) 071136 gram gave 0°2728 gram CO, and 0°0793 
gram H,O. O—65°4937%, H—7°7567.. 
4. (D) 0°1194 gram gave 0°2846 gram CO, and 0°0828 
gram H3O: C—6501%, BT ice 
5. (D) 0°1106 gram gave 0°2658 gram CO, and 0°0770 
gram H,O. O—65°54%, H—7'°73%. 
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