1905] LIVINGSTON—TRANSPIRATION AND GROWTH 183 
which is likewise the series obtained by arranging them in accord- 
ance with the amount of manure added. 
The two remaining curves indicate that both transpiration per 
FIG. 3 
unit area of the leaves and transpiration per gram of their green 
weight are practically uniform throughout the series; their curves 
are nearly horizontal lines. Of a 
course this uniformity is due to the 28% 
nearness to coincidence of the other 
three curves and is a criterion for 
judging of the latter property. There sogec--"" 
appears to be a very slight tendency 4 
for the transpiration per 
square centimeter to be 
depressed in the better 
soils, and a somewhat 
more marked, but still 
slight, tendency for the 
other ratio to be depressed 
In the same way. un ver ote aa v ig OT 
: 5/\.01,7°° - > --~ Airmen corre : 
In the following de- +0 a fee O07... ROL.---- OF 
inti : °. 
scriptions of series, the : : 
6 
tables of observed data ' * ~° 
will often be omitted, the 
