10 CONTENTS. 



Page. 



Miscellaneous tables 203 



Area of circles in square feet (Table 72) 203 



Contents of 1-inch boards in board feet and twelfths 



(Table 73)... 204 



Compound interest (Table 74) 205 



Annuities (Table 75) 207 



ILLUSTRATIONS. 



Page. 

 FIG. 1. The method of cruising by dividing a "forty" into 



16 small squares 69 



2. A method of making strip surveys that is used in the 



Lake States 71 



3. Curve showing heights of trees of different diameters . 84 



4. Method of recording standard logs and diameters 88 



5. Staff compass 96 



6. Measuring the height of a tree by means of two poles. 97 



7. Measuring the height of a tree by use of known height 



to eye of the observer 98 



8. Faustmann's height measure 99 



9. Manner of using Faustmann's height measure 101 



10. Method of sighting with standard hypsometer 102 



11. Combined surveyor's hand level and clinometer... 104 



12. Calipers for measuring diameters 107 



13. Cruisers' tree counter 108 



14. Cruisers' bark blazer 109 



15. Pressler increment borer 110 



16. Core extracted, showing rings. 110 



