OF THE ASH OF FOREST TREES. 327 



14. Bass-wood {Tilia americana) . 

 Tree sound. Mean diameter four feet from the ground, 22 inches. Average thickness of the bark, 1 inch. 



15. BuTTEBNUT {Juglons cinerea). 



Tree sound. Diameter three feet from the ground, 2 feet 8 inches; eleven feet from the ground, 1 foot 

 8 inches. The section for analysis was taken eleven feet from the ground. Average thickness of the 

 bark, J inch. Age 146 years. Between 65 and 70 outside layers were taken for outside wood, thick- 

 ness 4k inches; the remaining inside layers taken for inside wood. Growth of tree more rapid when 

 young. 



98-84 S. 100-20 8. 100-76 S. 99-16 8. 97-34 S. 



