File:Journal of forestry (1921) (14782871112).jpg

Identifier: journalofforestr19soci (find matches)
Title: Journal of forestry
Year: 1917 (1910s)
Authors: Society of American Foresters
Subjects: Forests and forestry Forests and forestry -- United States
Publisher: Washington : Society of American Foresters
Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
mical reasons for such a beliefare well shown in figure 8. which represents a cross-section of a sup-pressed Fraxinus. It will be observed that of the entire years incre-ment over two-thirds of the area is occupied by the spring vessels andshort fibers, while the remainder is possessed by the small summervessels and thick-walled fibers. In those woods where growth hasbeen more rapid, the area reserved for conduction is about equal tothat shown in the print, while the increased width is added to thestronger simimer portion. Even though in general increase in widthmeans increase in the number of summer fibers, it does not alwaysfollow that such woods will be strong, since the fibers may be thin-walled similar to those shown in figure 6. In the trade, ash of thischaracter is known as pumpkin ash, a term by no means restrictedto the wood of Fraxinus profunda. Brashness in white ash woods, therefore, appears to be associatedprimarily with a narrow summer growth, with thin fiber walls, with
Text Appearing After Image:
'

Note About Images