ILLUSTRATIONS. 



Page. 



Fig. 1. Measuring the height of a tree by means of two poles 8 



2. Measuring the height of a tree by means of a right-angled triangle.. 9 



3. Faustinan's mirror hypsometer 10 



4. Calipers for measuring the diameter of trees 11 



5. Section of the movable arm of Heyer's calipers 11 



6. Pressler's method of determining the volume of a standing tree 13 



7. Instrument used for determining the guide point 13 



8. Determining the factor of shape 14 



9. Determining the volume of a felled tree 16 



10. Showing the progressive development of a tree 30 



11. Pressler's accretion borer 33 



12. Determining the current accretion of a felled tree 35 



13. Representing average tree of dominant group dissected for analysis.. 57 



14. Graphic representation of height growth 59 



15. Cones representing size of stem at successive ages 60 



16. Graphic representation of volume growth 60 



