Article 2. Protection against extraneous Causes of 



Injury ... 461-463 

 3. Directly fostering the Growth of the 



Crop ... 463-465 



SECTION II. Cleanings ... 465-468 



111. Execution of preceding Operations ... 468-469 

 IV. Fostering Operations in an advanced crop, 



Generalities ... 469 

 Article 1. Ordinary Thinnings 



1. Their Advantages ... 470-472 



2. Principles on which they should be conducted ... 472-477 



3. When to make the First Thinning ... 477-478 



4. How frequently they should be repeated ... 478 



5. Season for making them ... 478-479 



6. Their Execution ... 479-480 



7. Concluding Remarks ... 480 



SECTION III. Plenary Thinnings ... 480-484 



IV. The Pruning of Trees ... 484-486 



V. Improvement Fellings ... 487-491 

 APPENDIX A. Results of difierent degrees of Ordinary 



Thinnings in Forests in Saxony ... 492-496 

 APPENDIX B. Alphabetical Index of Technical Terms 



used 497-500 



