CHAP. XII.] 
ALTITUDES . 
371 
of the Karuma Falls the river is navigable ; thus the 
observations of altitudes showing a fall of one foot 
per mile must be extremely accurate. 
The next observations to be compared are those from 
Karuma Falls throughout the westerly course of the 
river to the Albert Lake :— 
Feet. Feet. 
River level below Karuma Falls . . . . . 3,996 
Rionga’s island 3,864—80 feet cliff . . . . 3,784 — 212 fall 
to the west. 
River level at island of Patooan (Shooa Morn) 3,195 = 589 fall 
from Rionga’s island. 
Level of Albert Lake. 2,720 = 475 fall 
from Patooan to Lake. —— 
From Karuma. . . . . 1,276 fall 
These observations were extremely satisfactory, and 
showed that the thermometer (Casellas) behaved well 
at every boiling, as there was no confusion of altitudes, 
but each observation corroborated the preceding. The 
latitude of island of Patooan by observation was: 
2° 16': we were thus due west of Magungo, and east 
of Karuma Falls. 
B b 2 
