ON SOME ISOMERIDES OF ALIZARINE. 37 



obtained in the rapidly growing wood^ but the removal of 

 malaria is the introduction of better cultivation and addi- 

 tional wealth from other crops. (I have followed the spell- 

 ing of the several writers.) 



November 7th, 1876. 



Since writing the above notice I have been told that I 

 have underrated the work of the Romans, and that 30,000 

 trees of the Eucalyptus-species have been planted. I can- 

 not, however, think that even that number can form an ex- 

 periment of sufficient importance ; and the mode of planting 

 so as to produce a healthy house has not been described. 



I must still conclude that the delay is to be regretted ; 

 and one would think that an experiment which is so pro- 

 mising, or, rather, certain, to some extent, would be too 

 attractive to be neglected by any who thought upon it. — 

 R. A. S. 



VII. On some Isomerides of Alizarine. By Edwaed 

 ScHUNCK, Ph.D., F.R.S., and Hermann Roemer, 

 Ph.D. 



Read April 4th, 1876. 



Considering the importance of every thing connected with 

 the history of alizarine, we have been induced to undertake 

 the study of some of the isomerides of that body. These 



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