286 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
At least four other chapters should be written about this 
unique area by competent persons before it is too late: one on its 
geology, with special reference to the origin of the soil; one on its 
flora, with attention to the points mentioned on pages 273 and 282, 
and others easily called to mind; one on its fauna; and one on its 
agricultural and economic history. 
EXPLANATION OF PLATE 7 
Looking southeast in dry valley at head of Hempstead Brook, about 114 miles 
den 
east of Garden City, showing treeless horizon about М mile away. The view 
mbraces a'horizontal ang f about 40 (Th as no h 
mile of this spot, b mer as about four feet from 
the ground—had been raised a few feet, some buildings and planted trees would 
ve in the view.) Taken in a gentle rain at 4 p.m., Oct. 27, 1907 
(For other views taken near the same place see Bull Geog 2 
orreya The mos conspicuo us plant in the foreground of the former, 
included in the site of Camp Mills, and its aj arance greatly altered; so tha 
re will probably never again be an opportunity to take such a photograph on 
Long Island. 
ADDENDA (March, 1918) 
P. 276; The tradition is, Mr. Henry Hicks tells me, that a century or more 
This is not at all improbable, for a news item ina Kansas Ci ity paper of Oct. 27, 1915, 
reports blue-stem grass (Andropogon furcatus) growing toa height of 926 feet іп 
Chase Cou 
unty, Kansa 
Pp. 276, 284. а Hempstead Brook and East Meadow Brook within the 
rairie area are dry most of the time now, а considerable change having taken 
lowering of the ground-water about their sources by pumping from deep wells to 
supply the rapidly growing villages. 
