RECENT VALUES OF THE MAGNETIC ELEMENTS. 391 



3, 6, and 9 inch needles. A correction of — 5'i has been 

 applied to the mean published value of the Declination at 

 Potsdam ; see Ergebnisse der Magnetischen Beobachtungen 

 in Potsdam in iSgo-gi, pp. 79. The values of Horizontal 

 Force and Vertical Force at Batavia, published in last year's 

 tables, should be altered to "36754 and "20345 respectively ; 

 see the preface to Observations at Batavia, vol. xvi. 

 Batavia, 1894. 



