15 



not go on; even evergreens, such as pines and firs, lie dormant during the cold 

 weather. In such cases the annual ring is clearly denned. Other trees — and the 

 whole eucalypt family is included amongst them — are not entirely dormant through 



2 



- 



the winter, but continue to grow throughout the year, although their rate of growth 

 in cool weather is certainly smaller than in warm weather. But this intermittent 

 growth has the effect of either partially preventing the formation of rings or caus- 

 ing more than one indistinct ring to be formed in the same year. 



