CONTENTS ix 
PART IV. TIMBER ESTIMATING 
Section I. Introduction. 
Section II. Instrumental Helps. 1^2 
Section III. Height Measurement . .. 165 
Section IV. Volume Tables and Tree Form . . . 167 
Section V. Practice of Timber Estimating . . . 173 
A. Small and Valuable Tracts. I 74 
B. Larger and Less Valuable Tracts. 186 
1 . Type and Plot System. 187 
2 . The Strip System. 188 
3. Line and Plot System. 192 
C. Summary. 195 
D. Pacific Coast Methods.196 
PART V. TABLES 
Section I. Tables relating to Parts I and II 
1 . Stadia Reductions. 211 
l. Solution of Triangles. 212 
5. Traverse Tables.214 
I. Logarithms of Numbers. 220 
5. Logarithmic Sines; Cosines, Tangents, and Co¬ 
tangents . 222 
5. Supplementary Tables of Small Angles .... 228 
L Natural Sines and Cosines. 230 
3. Natural Tangents and Cotangents.232 
I. Specimen Lettering .234 
Section II. Tables relating to Parts III and IV 
1 . Volumes of Cylinders (Logs) in Cubic Feet . . 236 
2 . Areas of Circles or Basal Areas.238 
3. Cord Wood Rule.239 
4. New Hampshire Rule.240 
5. New York Standard Rule .242 
6 . Scribner Log Rule, Legal in Minnesota . . . 243 
7 . Decimal Rule of the U. S. Forest Service . . . 244 
8 . Doyle Rule.246 
9. Maine Log Rule.248 
10. Quebec Rule.250 
1 . New Brunswick Rule.253 
