MAGNETIC OBSERVATIONS. 



Note. — During the expedition of H.R.H. to Ruwenzori, Commander Cagni 

 undertook the magnetic readings, establishing stations at eight points : 



Bujongolo, Il)anda, Fort Portal, Kichiomi, Bimbya, Entebbe, Port 

 Florence, Mombasa. 

 The magnetic instrument used by him for the readings was modelled, not quite 

 successfully, on the French " Brunner," and of the small size suited for 

 travelling. This defective apparatus made the observations difficult and 

 fatiguing. 



The calculation and discussion of the results obtained Avere entrusted to 

 Pi-of. L. Palazzo, Director of the Central Bureau of Meteorology, in Rome. 

 This specialist was fain to conclude that, in order to derive any useful data 

 from Cagni's readings, he would have to repeat the readings with the instrument 

 in question and with another more accurate, in one at least of the places where 

 Cagni had established magnetic stations. This would enaljle him to obtain a point 

 of reference which would be useful for the reduction of the observations made 

 at all the other stations. Fortunately such an arrangement is now rendered 

 possible by the circumstance that Prof. Palazzo, who left in July charged with 

 a scientific mission to Zanzibar, proposes to land on the way at Mombasa, and 

 there take magnetic readings, Mombasa being one of the magnetic stations 

 included in the itinerary of the Euwenzori Expedition. In this way there is 

 reason to hope that sufficiently correct and practical results may be obtained 

 from Cagni's magnetic observations. The publication of these observations is 

 thus necessarily delayed till Prof. Palazzo's return from his mission. They will 

 then form the subject of a separate memoir, which will he published either in 

 the Annals of the Royal Hydrographic Institute, oi' in those of the Central 

 Meteorological Bureau. 



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