ON THE EUCALYPTUS NEAR ROME. 



25 



in this position by the pegs U, U in the end of the scale ; 

 the fine ink-line L L is drawn at right angles to S S^ the 



lens being used on a stand as before^ with its axis alwaj^s 

 in a vertical plane through L L. 



The divisions on the vernier scale will be i^ millimetre 

 in length. 



VI. The Eucalyptus near Rome. 

 By Dr. R. Angus Smith, F.R.S., V.P. 



Read April 4th, 1876, 



A FEW years ago I wi'ote to a friend in Italy suggesting 

 that, as he had leisure, he might try the value of the Eu- 

 cal/yptus in that country for the removal of those conditions 

 which engender malaria. His reply was somewhat to the 

 effect that every one was aware of the value of the tree, and 

 everywhere trials were being made, so that there Avas no 

 use in his doing Avhat evervbodv was doing. This was vei'v 



