18 TRANSPIRATION IN A DESERT PERENNIAL. 
Experiments III ro V. 
The subject of these experiments was an adult tree designated C, about 
20 feet high, growing southwest of the laboratory in an exposed place. 
Three separate small branches were used, branch c being without leaves, 
while d and e had a normal number of healthy leaves. The areas were: 
c, 35.47 sq. cm.; d, 18.13 sq. cm.; e, 8.20 sq. cm. The platform was used 
as before, but was mounted on a framework arranged to support the jar, etc. 
The leaves on the tree were always completely closed before the readings 
were begun. 
TaBLe 3.—Transpiration of a leafless branch (c) of an adult tree. Experiment IIT. 
Date. Time. T Date. Time. E - 
1911. 
Mar. 11...) 55 20™p.m. Mar. 11...} 55 15™ p.m 
Mar. 12.... 6 45 a.m... si} 0.00031 Mar. 12...) 6 55 a.m. 0.049 
io sm, ae ees 18 
pe Site a 00575 a2) te 151 
A om) cotta 1 1 132 
11 25 am... “t 11 35 
12 35 p.m... - 00338 12 45 068 
a iy eae “Hh .o0380 a 075 
2 30 p.m... satis 2 20 
Ae , 00292 ae 062 
tae Bam ccc} ozs rw 088 
5 15 p.m... Res 5 10 
Mar. 13... 7 25 am... ee -00019 |] Mar. 13...]. 7 30 -0071 | .026 
£8 peo 8 vo | 
9 30 am... waite 9 35 
10 55 a.m... ni} 00434 10 50 038 113 
ap eel amnell er 044 | 069 
. “1 ]) .00382 1 o49 | .078 
ae r}} -oozza a 044 | .063 
3 45 . 3 50 . 
oe } 00330 eh 053 062 
