TIL—Meteorological, etc., Observations. 
altitudes, but also because they serve to give an idea of the climate of* that 
interesting locality. 
Then at Table VII are brought together the data of Fort Portal for the 
same period of time, bearing in mind that to the pressures reduced to 0° has 
been applied the already-mentioned constant term of correction + 5 • 17 mm. 
Then from the mean data of Tables YII and VIII was calculated the difference 
of level between Bujongolo and Fort Portal. The first calculation was made 
with the data of the synchronous midday observations at Bujongolo and Fort 
Portal, and was found to be 2,276 • 7 metres (7,468 ■ 5 feet). 
But when we allow for the considerable difference of level between the two 
observed stations, we cannot assert with certainty that the law of daily variation 
of pressure is identical in both places, hence the coincidence of the hour of 
observation does not imply identity of modifications in the atmospheric ebb and 
flow, so that it becomes advisable to try and take advantage of the other 
observed data too, besides those of midday. Therefore with the mean daily 
values of pressure, temperature,! and vapour tension for Fort Portal (obtained 
from the mean of the three observations of the hours 7, 14, and 21 for 
Bujongolo) are associated the mean valnes of the pressure' and vapour tension 
deduced from the two observations of the hours 9 and 17. These, when account 
is taken of the normal movement of the daily variations of pressure and tension, 
should not differ greatly from the diurnal mean. 
For the temperature of Bujongolo we have assumed the mean of the 
maximum and minimum temperature, which, in the absence of more complete 
data, is the one that approaches nearest to the mean daily temperature. 
With the values thus obtained, and recorded at foot of Tables VII and VIII, 
the difference of level has been calculated between Fort Portal and Bujongolo, 
and is found to be 2,255 • 7 metres (7,376 feet). 
Taking as a more approximate value the mean between this and the 
preceding value, we get as the height of Bujongolo above Fort Portal 
2,266 metres (7,432 feet), and adding to this value the altitude of Fort Portal 
above the sea, the elevation of Bujongolo above the sea is found to be 
3,798 metres (12,461 feet). 
The camp being established at Bujongolo, where, as already stated, regular 
observations were taken three times daily from 15th June to 12th July, the 
excursions began to the chief places in the Ruwenzori Range. The instruments 
* Owing to the requirements of daily life at the Bujongolo encampment, the meteoro¬ 
logical observations were taken at the hours of 9, 12, and 17, instead of 7, 14, and 21, as at 
Fort Portal and Entebbe. 
f In the calculation of temperature no account is taken of the maximum and minimum, 
because at times they disagree with the other temperatures of the day. 
365 
