Liver Temperature. 
TABLE XIII. 
Mean Monthly Temperatures of the Nile, obtained from the 
materials given in Table XII., and employed in the 
Table of the Curves on page 58. 
57 
Between Assouan and Minieh, Between First and Second Cataract. 
Month. a _ r z 
Air, Water. | Water diff. Air Water diff. 
January, 58°7 60°6 +19 64°3 61°6 —-2°7 
February, 62°0 62°4 +0°4 68 6 (65°0) —3°6 
March, . 67°6 68°3 +0°7 74°9 (70°5) —4°4 
April, 73°0 70°5 —2°5 84-0 74:0 —10°0 
May,. 81:0 74:0 —7°0 88°5 (95) —13°0 
June, 84:0 75°6 —8'4 90:0 78°0 -—12°0 
July, ./-. 86°3 78°4 = 49 92-1 788 —13°3 
August, . 85°9 1937 -—6:2 91-2 82°6 —8°6 
September, . | 82°7 79°0 Sond 89-0 : —9°0 
October, . 79°6 76°7 —2°9 80°4 - 3°0 
November, . | 69:3 68°5 -—0°8 73:4 —5°6 
December, . 63°9 65:0 +1°1 65°9 —2°9 
74°5 71°6 -—2°9 80°2 -7°3 
TABLE XIV. 
Mississippr. 
New Orleans. Memphis. 
1} acm 
Month. 
January, . 
February, 
March, 
April, . 
May, . 
June, . 
July, . 
August, 
September, 
October, . 
November, 
December, | 
(44°5) 
| 
62°0 | 65° 
68°4 | 
78:71) 
800 8 
83:4 | 81°8 
81°7 | 79:0 
73°5 | 74:5 
59°4 | 63°4 
46°7 | 62°7 
45°8 
58°5 
50°7 | 64°8 
65°8 
752 
79°5 
07 
Capt. Humphreys and Lieut. Abbot. 
Prof. Riddell. 
Lieut. Marr. 
1852, 
Water Air. Water 
40°8 
42°5 
50°7 
56°5 
| 64°8 
76-0 
| 82-0 
85-0 
| 82°38 
76-2 
61-4 
48°5 
1853. 1846. 0. 1851. 
Air. |Water| Air. |Water| Air. |Water | Air. |Water 
52-2 45-0 44-3 | 39- 
(56°5) (43°5) | we | 47-2 | 42-0 
teat rts: 53°2|47°8| ... 
Se OOsee ede: |) aes 
'(73-0)| 66°6 | 65-6 | 
76°4 | 75-0 | 76:7 | 
81°9 | 79:0 | 83°9 | 
(83°7)| 81-1 | 84°7 
liar woul 
59°7 | 65°1 
50°5 | 51°4 
AQ | 422-2 
Note.—The means for February 1851 refer only to the last two weeks, and 
those for February 1853 to the first two weeks only. According to Dr Drake, 
the mean for the river at New Orleans, in February 1843, was 41°. 
The 
water mean for May 1846 applies to the last ten days, and that for August to 
the first two weeks. 
