MAGNETIC OBSERVATIONS. 



HORIZONTAL INTENSITY. OBSERVATIONS OF VIBRATIONS. 

 Set No. 8. November 2, 1866. 



109 



Extreme scale readings, 



At beginning .... 60.0 loi.o 



At end 68.0 92.8 



Temperature 52. 5 



Time of one vibration . . 7 s . 149 



