Bul. 523, U. S. Dept. of Agriculture. PLATE VIII. 
SOSA SEES Sree 
Fe ec 
F-95258 F-95259 
Fic. 1.—Black ash, 220 years old, from northern Fic. 2.—Green ash, 90 years old, the 
Michigan. _Nearly ail heartwood. ‘Tree 24 same size as the black ash in figure 
inches in diameter breasthigh. 1. From southeastern Missouri. 
Mostly sapwood. Much stronger 
than the black ash. 
Disks SHOWING MAXIMUM RATE OF GROWTH OF BLACK AND GREEN ASH, AND PROPOR- 
TION OF HEARTWOOD AND SAPWOOD. 
