THE SECRET OF THE BIG TREES. 
21 
abundant moisture stimulated rapid growth; where it is low. periods 
of aridity lasting often for centuries checked the growth of the trees. 
The other curve, the dotted line, is reproduced unchanged from the au- 
GENERAL SHERMAN, GIANT FOREST, SEQUOIA NATIONAL PARK. 
Height, 2S6 feet; diameter, 36 feet. 
thor’s volume on “Palestine and its Transformation. It represents 
the state of our knowledge of the changes of climate of western an 
central Asia at the time when that volume was written in 1910. I he 
