4 PRACTICAL wARBORICULT ORE 
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cured a footing. Little by little, it spread its branches upward and pushed its 
rootlets deeper into the granite mass. Into this crevice water lodged, frost 
kelped the tree to open wider the fissures and push deeper its roots, until now 
it has become a tree three feet in diameter and one hundred and twenty-five 
feet high. 
From the stage road it seems a tiny shrub, as it stands alone against this 
massive granite wall, and it is pointed out to the tourist as the tree which 
grows without soil. 
As I looked upon this sentinel tree I was persuaded that it possessed some 
power bevond the ken of man. We have not vet learned all the laws ot 
nature. As we cannot explain how lightning is drawn. unseen, unheard, along 
the wire, carrying with it the human voice, although our friend who speaks is 
a thousand miles away, neither can we tell how the tree attracts the rains, 
eathering the moisture necessary for its existence, and makes its growth seven 
hundred feet away from the nearest soil, high up on the face of this massive 
granite rock. 
On the return trip, again spending a night at Wawona, T visited the Mari- 
posa grove of sequotas— one of which, the Grizzly Giant, forms our frontis- 
