Sept. 1, 1925 
Thermostasy of Growth of the Date Palm 
439 
Table V .—Interior temperatures of the date palm compared with air and soil 
temperatures of corresponding hours , April 28 to May 4 
Time 
Air 
Soil 
Mak- 
toom 
(by 
ther¬ 
mom¬ 
eter 1) 
Za- 
heedy 
& 
mom- 
eter 2) 
Mean 
air 
Apr. 28: 
°F. 
°F. 
°F 
°F. 
°F 
6.30 a. m__ 
“64 
70.50 
» 76.20 
76.10 
7.15 a. m._ 
67 
75.20 
76.10 
9.30 a. m__ 
77 
75.20 
75.20 
10.40 a. m._ 
86 
71.00 
74.75 
74.48 
11.45 a. m__ 
89 
74.30 
74.30 
1.30 p. m._ 
91 
73.40 
73.22 
76.7 
2.45 p. m__ 
H 
73.85 
73.40 
3.45 p. m._ 
94 
71.00 
72.50 
73.58 
4.45 p. m._ 
91 
73.85 
73.40 
6.30 p. m__ 
85 
74.30 
74.30 
7.00 p. m._ 
82 
74.50 
74 75 
8.30 p. m_. 
78 
75.20 
75.20 
9.30 p. m~ 
76 
75.20 
75.20 
Apr. 29: 
6.00 a. m.. 
69 
77.00 
77.00 
6.40 a. m._ 
64 
70.75 
77.00 
76.82 
8. 50 a. m_ 
80 
76.10 
75.74 
1ft. 10 a. m 
86 
75.65 
75.20 
11.50 a. m._ 
88 
74.30 
75.20 
2.25 p. m._ 
95 
73.85 
71.60 
78.5 
3.05 p. m_. 
96 
73.40 
71.60 
4.03 p. m._ 
95 
71.00 
73.85 
71.78 
5.00 p. m _ 
94 
73.85 
72.95 
6.20 p. m . 
90 
74 30 
73.40 
7.07 p. m 
85 
74.75 
75.20 
8.30 p t m 
81 
75.65 
9.30 p. m__ 
74 
76.10 
76.10 
Apr. 30f 
6.12 a. m.. 
66 
70.00 
77.00 
77.90 
7.25 a. m_ 
70 
77.18 
77.45 
9.50 a. m. 
83 
77.18 
76.55 
10.20 a., m 
85 
76.55 
75.60 
11.40 a. m 
92 
76.10 
75.38 
1.15 p. m__ 
96 
75.20 
74 75 
2.15 p. m 
96 
7430 
72.00 
4.25 p. m__ 
91 
75.20 
73.40 
79.0 
6.52 p. m. 
85 
76.10 
75.20 
8.00 p. m__ 
80 
70.50 
77.00 
76.10 
9.30 p. m_ 
76 
78.35 
77.00 
May 1: 
6.30 a. m_. 
7© 
70.00 
80.60 
78.80 
7.30 a. m. 
73 
78.35 
77.54 
8.30 a. m 
79 
:::::::: 
77.72 
77.00 
9.30 a. m 
85 
77.45 
76.28 
11.13 a. m._ 
88 
77.00 
1.10 p. m.. 
93 
70.50 
75.65 
74.75 
3. 30 p. m— 
97 
73.40 
72.5# 
5.10 p. m._ 
96 
„ 
75.20 
72.95 
6. 30 p. m.. 
93 
. 
76.64 
73. 40 
82.5 
Time 
Air 
| 
Soil 
Mak- 
toom 
(by 
ther¬ 
mom¬ 
eter 1) 
Za- 
heedy 
(by 
ther¬ 
mom¬ 
eter 2) 
Mean 
air 
May 1—Con. 
°F. 
°F. 
°F. 
°F 
°F. 
7.45 p. m__ 
85 
70.50 
77.36 
73.76 
8.30 p. m__ 
77 
78.98 
76.10 
9.30 p. m.. 
70 
79.70 
76.64 
May 2: 
6.00 a. m__ 
55 
70.00 
80.60 
77.46 
7.30 a. m__ 
62 
79.70 
77.00 
8.45 a. m__ 
74 
78.80 
77.00 
’ 10.00 a. m__ 
78 
77.90 
76.82 
11.00 a. m__ 
83 
77.90 
76.64 
12.30 p. m__ 
90 
77.00 
75.74 
2.30 p. m__ 
97 
77.00 
74 75 
78.0 
3.30 p. m_. 
99 
76.10 
74.30 
! 4.30 p. m__ 
101 
70.50 
76.10 
74.30 
| 5.30 p. m„ 
95 
76.10 
73.40 
6.30 p. m_. 
90 
76.10 
73.58 
7.30 p. m~ 
82 
76.55 
73.58 
8.30 p. mu- 
73 
70.50 
77.00 
75.56 
May 3: 
6.00 a. m__ 
60 
71.00 
79.26 
79.70 
7.10 a. m__ 
61 
79.16 
79.25 
8.30 a. m._ 
73 
i. 
78.80 
78.35 
9.35 a. m._ 
80 
78.35 
77.90 
10.30 a. m._ 
85 
77.90 
75.65 
11.30 a. m,_ 
90 
77.36 
75.38 
80.0 
12.30 p. m~ 
92 
77.00 
75.20 
1.40 p. m~ 
95 
75.65 
75.20 
2.45 p. m__ 
99 
75.56 
74 30 
3.45 p. tti _ _ 
98 
75.30 
73.76 
4 30 p. m__ 
97 ' 
75.20 
73.76 
5.30 p. tti 
95 1 
. 
75.20 
73.76 
6.30 p. m__ 
90 
71.00 
75.20 
74.30 
7.30 p. m„ 
85 
76.10 
May 4: 
6.15 a. m__ 
60 
70.60 
80.16 
79.70 
7.30 a. m__ 
65 
80.15 
78.80 
8.30 a. m 
75 
79.70 
78.35 
9.30 a. m._ 
79 
78.80 
78.08 
10.30 a. m__ 
83 
77.90 
78.08 
11.30 a. m__ 
85 
77.00 
77.90 
12.35 p. m__ 
87 
71.50 
76.64 
76.64 
1.30 p. m~ 
90 
76.55 
75.56 
2.25 p. m__ 
92 
76.55 
74 93 
77.0 
3.30 p. m~ 
98 
76.10 
74 75 
4.30 p. m~ 
92 
76.10 
74 75 
5.30 p. tti __ 
91 
76.10 
74 75 
6.30 p. m— 
87 
76. 55 
75.02 
7.30 p. m~ 
80 
77.36 
76.10 
8.30 p. m— 
78 
71.50 
78.44 
76.82 
a Figures in bold-face type indicate lowest temperature for the day 
6 Figures in italic indicate highest temperature for the day 
