MAGNETIC OBSERVATIONS. 



103 



Set. 





t 



Set. 



Ig mX 



I (J m 



A' 



m 





1 

 2 

 3 

 4 

 8 

 9 

 10 

 11 



9.45303 

 9.46389 

 9.46412 

 9.46934 

 9.46150 

 9.46666 

 9.46438 

 9.41442 



39.08 

 38.1 

 43.8 

 41.4 

 31.9 

 38.5 

 43.9 

 46.4 



5 



6 



1 



12 



13 



9.53031 

 9.52S32 

 9.52844 

 9.53615 

 9.53604 



9.49985 

 9.49491 

 9.49155 

 9.40026 

 9.50523 



1.111 

 1.089 

 1.082 

 1.013 

 1.080 

 1.014 

 1.081 

 1.014 



0.316 

 0.313 

 0.314 

 0.316 

 0.320 



at 41°. 6 



Mean . 



1.084 



0.316 





Set 1. 



Netlik, Whale Sound. August 4, 1861. 

 Vibrations. Magnet Z 6 suspended. Temperature, 48°. 

 Chronometer 4'' 40" 04° fast of Greenwich time. 



Q 



2" 25° 53» 



300 



2'^ 59° 32=' 



33" 



39^0 





10 



21 01 



310 



3 00 40 



33 



39.0 



Observed time of 



20 



28 08 



320 



01 41.5 



33 



39.5 



300 vibrations, 2020^08 



30 



29 15 



330 



02 55.5 



33 



40.5 



Time of one, 6.1336 



40 



30 22 



340 



04 03 



33 



41.5 





50 



31 29 



350 



05 10.5 



33 



41.0 





100 



31 06.5 



200 



2 48 19.5 



33 



40.08 







Aro: 110.5 and 425 at 









261 342 " 200 









218 322 " 350 vib's. 









Set 2. Vibrations. Temperature, 46° 









gh 10° 42».5 



300 



gh 44m 24s 



33° 



4P.5 





10 



11 50 



310 



45 32 



33 



42.0 



Observed time of 



20 



12 51.5 



320 



46 39.5 



33 



42.0 



300 vibrations, 202r.83 



30 



14 04.5 



330 



41 46 



33 



41.5 



Time of one, 6, 1394 



40 



15 12 



340 



48 54 



33 



42.0 





50 



16 20 

 21 56.5 



350 

 200 



50 02 

 3 31 10.5 



33 



42.0 





100 



33 



41.83 







Arc : 190 and 425 at 









255 345 " 200 









218 322 " 350 vib's. 









Observations for Torsion. 









Torsion circle. 



Scale. 



Diiferences. 











60° 30' 



300 













150 30 



320 



20.0 











330 30 



286 



34.0 



Mean (4) 



= 11.1 = 11'.3 





60 30 



300.5 



14.5 









Set 3. Deflections. 

 Magnet Z 1 suspended, Z 6 deflecting, Distance 1 foot. P. M. August 4. 



w. 



E. 



E. 

 W. 



E. 



39° 24' 

 332 54 

 332 45 



39 24 



10" 

 00 

 20 

 00 





24' 40" 

 54 50 

 45 40 

 24 40 



42° 

 40 

 39 

 38 



2». = I60 30' 00 

 2 ^t = 66 38 50 





Mean 



. 39.1 



tt = 33 11 12 



