1904] MAC DOUGAL—DELTA AND DESERT VEGETATION 59 
ment being compared before being taken into the field and after its 
return with other instruments for standardization. The data given 
below are corrected results, not direct transcripts from the notebook. 
Station 1. 
Camp on dried mud flats on shore of Rio Colorado a kilometer 
below international boundary in Baja California; observations taken 
twenty feet from margin of bank amid willows and poplars; wind 
blowing offshore; see fig. 1. 
Jan. 28 4:30 P.M. 60° F. 17% rel. hum. 
oon ie = la eae 15 . 
eae. Soo..." + aie 18 
eee | 12:45 A.M age 41 : 
“ 29 I:20 “ 30 “cc 5° ia 
a Gon = a9 “ 66 : 
“29 6:25 “ 27“ i. 
<a yp eee 36 60 = 
i 3O 7:40 Sun on instrument 36 5 
Station 2. 
Camp on small island in great bend 33" downstream from Yuma, 
covered with a dense grove of Salix except at one end. 
Jan. 29 4:50 P.M. 61° F. 21% rel. hum. 
a9 29 7:10 a4 a7 ac 75 “cc 
woe S46 cS 57 Py 
ae 2:45 A. M. ~ * 84 . 
“ 30 5:45 “ 26 “ 58 tc 
we 7:50 Sun on instrument 35 - 
Station 3. 
Camp at lower end of high mesa bank below La Grulla, Sonora; 
observations taken at a point 60™ from margin of bank 13” in 
height, constituting bank of river, among bushes of Covillea, Ephe- 
dra, etc. (fig. 2). 
Jan. 30 4:40 P.M. oo 19% rel hum. 
bg . “ és 6 “ 
3° 4:50 68 I g 
tc 30 - 7100 ‘cc 54 “ 15 : 
‘af 30 : 8:30 “cc 48 “cc 27 ‘ 
ce 6:30 A.M. “a 30 
a As, = ite a 29 
