MAGNETIC OBSERVATIONS. 



Horizontal Intensity. Observations of Vibrations. 

 Set No. 8. November 2, 1866. 



109 



No. 



Time. 



No. 



Time. 



Time of 1 50 

 vibrations. 







i h 40™ I9».2 



150 



1- 58- ii«. 5 



17™ 52'- 3 



10 



1 41 3°-7 



160 



1 59 23.0 



•7 52-3 



20 



1 42 42.2 



170 



2 34.5 



'7 52-3 



30 



« 43 53-7 



180 



2 1 46.0 



'7 52.3 



40 



1 45 5-2 



190 



2 2 57.5 



'7 52.3 



5° 



1 46 16.7 



200 



2 4 9.0 



>7 52.3 





Mean .... 



'7 52-3° 



Extreme scale readings, 



At beginning .... 60.0 — 101.0 



At end 6S.0 — 92.8 



Temperature 5 2 °.5 



Time of one vibration . . 7 s . 149 



