MAGNETIC OBSERVATIONS. 



NoTK. — Diiriiii; tlie expeilition of H.K.Ii. to KuuxMizori, Coiiini.indur Cagiii 

 niulertook the magnetic readings, establishing sttitioiis at eight points: 



BujongoJo, llianda, Fori Portal, Kichionii, BiniUya, Knlelibc, Port 

 Florence, Moniliasa. 



The magnetic instrument used I)}' him for the readings was modelled, not ijuite 

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

 travelling. This defective apparatus made the ol)Servati(jns dittirult and 

 fatiguing. 



The calculation and discussion of tiie results olitained were entrusted to 

 Prof. L. Palazzo, Director of the Central Bureau of Meteorology, in ]{ome. 

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

 from Cagni's i-eadings, he would have to rejjeat the readings with the instr\iment 

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

 Cagni had estalilishcd magnetic stations. This would enalile him to obtain a point 

 of reference which would lie useful foi' the reduction of the oliservations made 

 at all the other stations. Fortunately s>\ch an ariangement is now rendered 

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

 a scientific mission to Zanziliai-, 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 IJuwcnzdri E.xpedition. In this way there is 

 reason to hope that sufficiently correct and practical results may lie olitained 

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

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

 then form the subject (if a separate memoir, which will be pulilishcd either in 

 the Annals of the K(iy.il li\iliographic Institute, or iii those nf the Central 

 Meteorological Bureau. 



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