Appendix B. 
On 12th May, at Entebbe (noon at Mombasa), we obtained, by the above- 
mentioned telegraphic comparison, as correction on the mean Greenwich time: 
Kj = + 3 h 16 m 54 s - 0 
K 2 = + 3 25 52-0 
K 3 = + 3 2 10 -5 
From these elements we get the following diurnal corrections for the three 
chronometers : 
Bj = - 2 s - 762 
B 2 = + 2-215 
B 3 = + 3 • 437 
The elements respecting the chronometer No. 4 have been omitted because 
on 7th May, when the party reached Entebbe, that chronometer was stolen. 
The start for Ruwenzori was made at Entebbe, capital of the Uganda 
Protectorate, and on the march some astronomical observations were made in 
order to fix the position of some points which were generally those of encamp¬ 
ments. Obviously it was not a case in which too much reliance could be placed 
on the Greenwich time, as indicated by the chronometers during the period of 
one month of rough travelling, that being about rhe time occupied in reaching 
Bujongolo, last point where were obtained astronomical observations, and where 
were begun the topographic operations for the survey of the Ruwenzori 
highlands. In order, however, to secure the greater or less efficiency of the 
chronometric observations, it was found expedient to observe, with the 
determination of the local time at Bujongolo, the emersion of B A C 81 from 
the lunar disk, with a view to calculating the hour of Greenwich time at the 
moment when the phenomenon was observed. 
During the march the chronometers were carried on his person by H.R.H., 
who kept them carefully wrapped up. This expedient should have reduced to 
a minimum the influence of the changes of temperature, if, during the hours of 
rest, when being replaced in their own boxes, they had not had to feel the 
effects of the temperature inside the tent. Such effects, though little different 
from those of the atmosphere, always differed greatly from those due to contact 
with the human body. Still, when we consider that the period of repose was 
daily repeated for about the same length of time, it may be inferred that the 
daily recurring correction cannot have been affected by serious error due to 
this cause. 
In any case it is to be regretted that of the three chronometers one alone 
displayed a sufficiently regular action, maintaining a fairly slight daily 
correction. This may easily be seen from the record of the chronometers. 
310 
