EUCALYPTI s. 75 



special attention to this variability in the character of 

 Eucalyptus woods. Eucalyptus marginata has been noted 

 as varying to the extent of 33 per cent, in its contents of 

 kino. Our yellow pine (Pinus ponderosa) has a wide 

 range in the west, and varies in its timber value with its 

 situation. Probably all trees do the same. 



The age of trees, and their vigor of growth for their 

 age, have much to do with the character of their timber. 

 The season of the year when they are cut and the curing 

 afterward should also be investigated. I can remember an 

 opinion that was often acted on that the Southern live- 

 oak could only attain its highest value when seasoned 

 tinder water. 



It may be seen, if this opinion be presumed correct, 

 that tests of live-oak differently cured might give results 

 not uniform as to the value of the timber. 



Another source of possible error is the laxity as to exact 

 identification of the species of trees from which timber for 

 testing is taken. 



Some years ago piling of "Eucalyptus marginata" was 

 brought to San Francisco and tested on the sea wall. In 

 one year it was riddled with teredo. I saw the piles after 

 they were pulled and I could not believe that they really 

 were from the Jarrah, a world - renowned teredo and white 

 ant resistant. 



The precaution taken to obtain marginata timber from 

 its best districts or even to be secure that it was margi- 

 nata at all were in my opinion inadequate. Specimens of 

 Karri may be seen at Paradise Nurseries and at Forestry 

 Station. 



