Specimen Observations and Computations 



35 



Magnetic Observations and Computations. 



Horizontal Intensity: Deflections. 



Station: Tckrit, Asiatic Turkey Date: Tues. Dec. 13, 1910 Obs'r: W. H. S. 



Instrument: Mag'r No. 7 Chron. No.: 257 



Magnet 7L(E) deflecting at right angles to Magnet 7S(E) suspended. 



Mag- 

 net 





North 

 end 



E 

 W 



Mean 



Circle Readings 



I. Distance r = 27.5 cm. 



No. 



124 35 00 

 99 39 40 



Mean 



34 50 34 55 

 39 20 39 30 



112 07 12 



II. Distance r = 3S.0 cm. 



No. 



Mean 



04 50 

 07 25 



Q t tt 



112 06 80 



2u 



24 55 25 



11 57 25 



W 

 E 



99 32 00 

 124 35 50 



31 50 

 35 40 



04 45 



05 20 



Mean 



112 03 45 



112 05 02 



2u 



25 03 50 



12 00 35 



a + b 



c + d 



Mag. Mer. 



112 05 28 



112 05 35 



Mean Mag. S. Mer. 112 05.5 



Formulae: = 

 m 



2 1 + -,+ 



(-1) 



s^ = s^ ; log H = r I log h log mH ) 



Sin u Sm u 2\m / 



2 u (mean) 

 u 



Began at 

 Ended at 



24 59 38 

 12 29 49 



II 



O f ft 



11 59 00 



5 59 30 



Mean 7 07.5 



Chr. to L. M. T. + 2 5 2.1 

 L. M. T. 10 00 



k tfl O 



6 58 Temp. 11.0 



7 17 " 11.8 

 " 1 3.5 



t = 12.10 



Set 



logC 

 " Sin u 



,. H 



m 



mH* 

 H 



H 



log m 

 log [1 + "I 

 (t - t.)ql / 



log ms 



5.99098 

 9.33523 



6.65575 



2.26160 

 9.45868 



0.28753 



2.80292 



-0.00166 



2.80126 



632.79; 



II 



5.67423 

 9.01863 



6.65560 



2.26160 

 9.45860 



0.28747 



2.80300 



-0.00166 



2.80134 



632.91 



* From oscillations. 



