TIT. — Meteorological, etc., Observations. 



altitudes, but also l)ecause they serve to give an idea of the climate of* that 

 interesting locality. 



Then at Ta1)le VII arc l)rought together the data of Fort Portal for the 

 same period of time, ])earing in mind that to the pressures reduced to has 

 heen applied the already-mentioned constant term of correction +5* 17 mm. 

 Then from the mean data of Tables VII 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 metre!> (7,468*5 feet). 



But when we allow for the considerable difierence of level between the two 

 ol)served 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 elib 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, f and vapour tension for Fort Portal (olitained 

 from the mean of the three observations of the hours 7, 14, and 21 for 

 Bujongolo) are associated the mean values of the pressu.re and vapour tension 

 deduced from the two observations of the hours 9 and 1 7. These, when account 

 is taken of the normal movement of the daily ^'ariations of pressure and tension, 

 should not difter 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 tempei'ature. 



With the values thus obtained, and recorded at foot of Ta])les 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 l)etween this and the 

 preceding value, we get as the height of Bujongolo above Fort Portal 

 2,2GG 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 lie 

 •3,79S 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 liegan to the chief places in the Riiwenzori Range. The instruments 



* Owing to the requirements of daily life at the Bujongolo eucaiupineut, 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. 



t 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. 



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