M A G N E T I C A L OBSERVATIONS. 



25 



Horizontal intensity. Experiments of vibration. 



1856. September 17, P. M. Vibrating magnet D 3. 



No. 





 10 

 20 

 30 

 40 

 50 

 100 



Chronometer. 



3'" 29^8 



55.6 

 22 



4S.2 

 14 4 

 40 8 

 51.8 



No. 



300 

 310 

 320 

 330 

 340 

 350 

 200 



Chronometer. 



S^ 16" 30M 

 17 2.3 



17 

 17 



18 



2S8 

 54 8 

 212 



18 472 

 12 13.6 



Time of 300 vibration.?. 



13-" 6\3 



6.7 

 68 

 66 

 68 

 6.4 



13 O.GO 



Extreme scale readings. 





 100 

 200 

 350 



12.0 

 15.0 

 17.0 

 20.5 



48.0 

 45.0 

 43.0 

 39 5 



Temperature 71°. 8 F. 

 Time of 1 vibration 2^G220. 



1856. September 17, P. M. 



Vibrating magnet D 3. 



No. 



Chronometer. 



No. 



Chronometer. 



Time of 400 Vibrations. 







10 

 20 

 30 

 40 

 50 

 100 





 100 

 300 

 440 



S^ 25"> 

 25 

 25 

 26 

 26 

 27 

 29 



5^2 

 31.4 

 57 5 

 24.0 

 49 9 

 16 2 

 27.5 



400 

 410 

 420 

 430 

 440 

 450 

 300 



42> 

 43 

 43 

 43 

 44 



34". 



0.2 



26 6 



52 8 



19 2 



28'. 8 



28.8 



29.1 



28.8 



29.3 



38 11.0 



17 28.96 



Extreme scale readings. 



13 

 17.0 

 200 



23.0 



47.0 

 43.0 

 39.5 

 37.0 



Temperature 0S°.7 E. 

 Time of 1 vibration 2'. 0224. 



1856. September 17. 



Vibrating magnet D 3. 



No. 





 10 



20 

 30 

 40 



50 

 100 



Chronometer. 



No. 



Chronometer. 



9" 17™ 40^2 

 18 6.4 

 18 33.0 



19 25 

 19 51.3 

 22 2.4 



300 

 310 

 320 

 330 

 340 

 350 

 200 



Time of 300 vibrations. - 



13 C.OO 



Extreme scale readings. 





 100 

 200 

 350 



160 440 



18 7 41.3 



20 2 39.8 



228 37.? 



Coefficient of torsion. 



Torsion circle. 



Temperature 66°. F. 



Time of 1 vibration 2».G220. 



