On the System of Planting at Welbeck. 
367 
remained. The drawing: from which the .iccompanyino- woodcut 
has been taken was made in September of the present year by an 
artist on the spot. The one arm, thouijh the bark is separated 
from the wood, still shows life, and puts into leaf, and produces 
acorns to this day. 
The Greendale Oak. 
The girth of the Great Porter at 4 feet from the ground is 
27 feet 8 inches. It contains about 1100 feet of solid wood in 
the stem, about 1300 including the large arms. 
But an oak tree of 100 years old of an average growth, will 
not contain more than 50 feet of timber. It seems difficult to 
estimate the number of years, or even of centuries, that would be 
required to bring to perfection such a tree as the Great Porter. 
