MAGNETIC OBSERVATIONS. 



47 



The following are specimens of the forms employed in recording and reducing 

 the observations of vibrations and deflections. 



HORIZONTAL INTENSITY. 

 Observations of Vibrations. 



Station, Acapulco, Mexico. Date, May 3oth, 1866. Magnet C. 32. Inertia ring No. 

 Chron. Fletcher 906, rate, i 8 -38 losing on mean time. 



