PLATE 11. 



A. 



Section from a spruce tree 200 years old (sp. gr. 

 0*627). Slow regular growth in a dense forest. Wood 

 of best quality for cleaving : used for violins, &c. Forest 

 of Chamounix (Haute Savoie). Altitude 4,550 feet. 



Section from a larch tree. Kegular structure, even 

 B. -j and moderately fast growth. Kippendavie, Perthshire. 

 Old red sandstone. 



( Section from a larch tree. Very rapidly grown wood 

 C. j produced at a low altitude. Lord Bathurst's woods, 

 I near Cirencester. Great oolite. 



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