RECENT VALUES OF THE MAGNETIC ELE- 

 MENTS AT THE PRINCIPAL MAGNETIC 

 OBSERVATORIES OF THE WORLD. 



[Continued through the courtesy of the Kew committee as in July, 1894.] 



IN the case of a few of the observatories data have been 

 supplied by the courtesy of the directors more recent 

 than those in their latest publications, but in the great 

 majority of instances recourse has been had to the publica- 

 tions themselves. In one or two cases the values given 

 last year have had to be repeated. The observatories are 

 arranged according- to their latitude. The longitude is in 

 all cases referred to Greenwich. In some few cases where 

 the geographical position had to be extracted from a map, 

 and in others where conflicting statements existed, there 

 may not unlikely be appreciable error. 



The data in the table are deduced from hourly readings 

 of the magnetic curves in the case of Pawlowsk, Katharinen- 

 burg, Copenhagen (Declination and Horizontal Force), 

 Hamburg (Declination), Wilhelmshaven (Declination and 

 Horizontal Force), Irkutsk, Potsdam, Utrecht (Declination), 

 Kew, Greenwich, Uccle (Declination), Falmouth (Declina- 

 tion and Horizontal Force), Pare Saint Maur, Vienna, Pola, 

 Perpignan, Xiflis, Nice ( Declination), Washington, Zi-ka-wei, 

 Manila, Batavia, and Mauritius (?). 



In the case of Madrid (Declination), Prague (Declina- 

 tion), O'Gyalla (Declination and Horizontal Force), Coimbra 

 (Declination), Lisbon (Declination), and Kasan (Declina- 

 tion and Horizontal Force), the diurnal inequality has been 

 at least partly, in some cases probably with great exactness, 

 allowed for by taking readings from curves or absolute 

 instruments at two or more different hours. 



For the explanation of the apparent rise in Vertical Force 

 at Kew since 1893, see "The Report of the Incorporated 

 Kew Committee," Roy. Soc. Proc, 1895. The first results 

 of Greenwich Inclination and Vertical Force are deduced 

 from readings with 3 inch dip needles only, the second from 



