Magnetic Disturbance on September 25th and 26th, 1841. 161 

 Observations of Magnetometers continued, September 27. 



Half-hourly Observations from 2 a.m. to 9 A.xr. of the 28th of September. 



Phil. Mag. S. 3. Vol. 20. No. 129. Feb. 1842. 



M 



