in.— KEPUKT UN METEOKOLOGICAL AND 

 ALTIMETEIC OBSERVATIONS MADE BY 

 H.R.H. THE DUKE OF THE ABEUZZI'S 

 EXPEDITION TO RUWENZOKI (190(i). 



By Prof. DOMENICO OMODEI. 



The meteorological observations were made during the whole jomiiey, 

 from 16th ^lay to 12th August, for the twofold purpose of first giving an idea 

 of the climate of these regions, at least for the short time of stay, and then of 

 determining, at least approximately, the altitudes of the various places, and 

 especially of the more important points of the Kuwenzori Range, which was the 

 chief objective of the expedition. 



The instruments used in the observations consisted of three mercurial 

 barometers * of the Fortin type, one registering barometer, three aneroids, two 

 hypsometric thermometers, three thermometers and one psychrometei-. 



Before starting, these instruments were carefully compared with the 

 normal instruments, and to all the data, which are recorded farther on, were 

 applied the terms of correction thus establislied. 



During the first part of the journey from Entebbe! to Fort Portal, from 

 16th to 2Sth May, the observations for pressure, temperature and humidity, 

 as well as those relating to the state of the weather, were taken exmy day at 

 noon, while other less complete observations were made at 15 and I'l o'clock. 

 The summarj' of the observations is contained in the accompanying Table I. 

 The maximum and minimum temperatures have reference to the whole period 

 of the stay of the expedition in a given station, that is, generally from alwut 

 10 or 11 in the mornintr till the first antemeridian hours of the next dav. 



* Two graduated from 720 to 240 mm., and one from 480 to 290 mm. for the uplands, 

 t Here there is an observatory, tlie altitude of which is known, hence it was taken as 



the basal station for the determination of the altitudes of places between Entebbe aud Fort 

 Portal. 



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