SOME NEW ENGLAND EUCALYPTS AND THEIR ECONOMICS. 271 



The other species of special interest is E. nova-anglica. 

 As its name implies, its principal location is in the New 

 England district. The previous determination of its 

 essential oil was published in the "Research on the Euca- 

 lypts," p. 34, and it was there shown to consist principally 

 of the sesquiterpene peculiar to Eucalyptus oils. Nearly 

 three-fourths of the oil of this species consists of that con- 

 stituent. The chief terpene in this oil was also shown to 

 be dextro-rotatory pinene. It might reasonably be supposed 

 that the presence of such a large amount of a high boiling 

 constituent as the sesquiterpene would cause the oil to 

 alter considerably at various times of the year, or when 

 the trees were grown under variations of climate, or 

 influenced by soil or local conditions, and to decide this 

 point further investigations have been made with the oil of 

 this species. Here again, however, was found a remarkable 

 constancy of constituents and physical properties in the 

 oils from varying localities. 



Species. 



Eucalyptus acaciaeformis, Deane and Maiden. 



"Red" or "Narrow-leaved Peppermint." 



Historical. — It was first brought before the scientific 



world by J. H. Maiden in a paper on "Some Eucalypts of 



the New England Tableland," read before the A.A.A.S. in 



1898, being Eucalypt No. 3, of that article. 



Messrs. Deane and Maiden described and figured it in 

 the Proc. Linn. Soc. N.S. Wales, 1899, under its present 

 specific name. 



Remarks. — This is one of the most widely distributed of 

 the "Peppermints" of New England, and so far has not 

 been recorded outside that area. Its oil is now described 

 for the first time. 



Essential Oil. — Leaves were obtained from Tenterfield 

 and distilled 15/1/10. The material was collected as for 



