xviii ILLUSTRATIONS 



SECTION OF WHITE ASH, SHOWING EFFECT OF LACK OF AIR 

 AND MOISTURE FOR ROOTS ON ONE SIDE .... 72 



NATURALLY GROWN WHITE PINE SEEDLINGS, SHOWING LACK 

 OF FIBROUS ROOT DEVELOPMENT 88 



NURSERY-GROWN WHITE PINE SEEDLINGS AND TRANSPLANTS, 

 SHOWING GOOD ROOT DEVELOPMENT 88 



PENNSYLVANIA STATE FOREST NURSERY, ASAPH, PENNSYL- 

 VANIA, SHOWING LATH SCREENS OVER SEEDLINGS . . 96 



WHITE ASH IN THE EXPERIMENT FOREST PLANTATION AT THE 

 STATE UNIVERSITY, CHAMPAIGN COUNTY, ILLINOIS . . 96 



TEN- YEAR-OLD WHITE PINE PLANTING NEAR MONT ALTO, ON 

 PENNSYLVANIA STATE FORESTRY RESERVATION. WORK OF 

 STUDENTS OF THE PENNSYLVANIA STATE FOREST ACADEMY 136 



TYPICAL IDAHO FOREST, SHOWING WESTERN WHITE PINE, 

 LARCH, AND CEDAR, KANIKSU NATIONAL FOREST. . . 146 



SUGAR PINE, KINGS RIVER, FRESNO COUNTY, CALIFORNIA . 146 



ROUND, OR UNTAPPED, TIMBER. VIRGIN FOREST OF LONGLEAF 

 PINE, OCILLA, GEORGIA 154 



LOBLOLLY (OLD-FIELD) PINE, SHANNON COUNTY, MISSOURI . 160 

 SHORTLEAF PINE, SHANNON COUNTY, MISSOURI .... 160 



VIRGIN FOREST OF WESTERN YELLOW PINE AND DOUGLAS FIR 

 NEAR MOUNT SHASTA, CALIFORNIA 170 



SCOTCH PINE IN DENSE STAND ON CAMPUS, IOWA STATE COL- 

 LEGE, AMES, IOWA 176 



DOUGLAS FIR, SHOWING TREES MORE THAN SEVEN FEET IN 

 DIAMETER. WESTERN WASHINGTON 200 



VIRGIN STAND OF WHITE PINE AND HEMLOCK, WITH SECOND 

 GROWTH OF EACH COMING ON WHERE ORIGINAL FOREST 

 WAS cur OFF. CLEARFIELD COUNTY, PENNSYLVANIA . 204 



VIRGIN STAND OF HEMLOCK, FROM ONE HUNDRED AND FIFTY TO 

 Two HUNDRED YEARS OLD, TIOGA COUNTY, PENNSYLVANIA 204 



