xviii TABLE OF CONTENTS 



CHAPTER XVI. 



SYLVICULTURAL NOTES ON TIMBER TREES continued. 

 CONIFEROUS TREES. 



Cupressus ........ 386 



Douglas Fir . . . . . . . . 389 



Larch .... .... 392 



Pines ......... 400 



Silver Fir ........ 414 



Spruce ........ 418 



Thuya ..... . . 424 



CHAPTER XVII. 



MEASUREMENTS FOR PURPOSES OF FOREST MANAGEMENT. 



Height of Trees . . . . . . 426 



Basal Area ........ 427 



Form Factor ........ 428 



(1) Measurement of Sample Trees ..... 429 



Weise's method ....... 430 



Other methods . . . . . . .431 



(2) Measurement of Sample Plots ..... 432 



(3) Estimation by Reference to Average Yield Tables . . 434 



CHAPTER XVIII. 



ESTIMATION OF INCREMENT ON CROPS OF TIMBER. 



1. Increment in Cubic Contents ..... 437 



Increment on Standing Timber . . . . .441 



Pressler's Formula ...... 443 



Schneider's Formula ...... 444 



Maw's Formula . . . . . . . 446 



Increment on Felled Timber ..... 448 



Current Annual Increment ..... 459 



Average Annual Increment . . . . .451 



2. Increment in Quality . . . . . .451 



3. Total Increment on Invested Capital .... 452 



