THE ALUMNI JOURNAL 



23 



Separate the phellandrene nitrite from the test solution and oil by 

 filtration, wash the residue on the filter with distilled water ; in which 

 the phellandrene nitrite is insoluble ; to free it of the reagents used in 

 testing for its presence, now wash it with methyl alcohol, in which it is 

 only slightly soluble, to free it of adhering oil. 



After this treatment the residue should be practically colorless. 



Now dissolve the residue in ether, in which it should be e-xtremely 

 soluble, and crystallize from same. 



If tlie crystals form in concentric clusters and have a melting point 

 of io5°C. it will suffice to prove their presence. 



on. OF EUCALYPTUS. 



B. B. ALT, Phar. D. 



