Specimen Observations and Computations 



37 



Magnetic Observations and Computations. 



Declination Observations with Magnetometer. 



Stalion: Tekrit, Asiatic Turkey 

 Instrument: Mag'r No. 7 

 Mark: A, Projection on house in Tekrit 

 Magnet: 7L 



Date: Tues. Dec. 13, 1910 

 Observer: \V. H. S. 

 Chronometer: 257 

 Line of detorsion: 13 



Chron. 

 Time 



m 

 20 

 21 



23 

 24 

 25 

 26 



28 

 29 



Horizontal Circle Readings 



Magnet erect, mean scale 

 Magnet inverted, mean scale 

 Mean scale 



d 

 45.36 

 50.88 

 48.12 



Mean scale reading 



Center 



Center mean 



Reduction to center 



Circle reading 



Mag'c S. M. reading 



Mark reading 

 Azimuth of mark* 

 True S. M. reading 



Magnetic declination (East) 



111 



d 

 48.12 

 50.00 

 + 1.88 



+ 2.8 



04.8 



HI 



07.6 



273 58.1 

 164 22.4 

 109 35.7 



+ 1 



31.9 



Mean chron. time 

 Chron. corr'n to L. M. T. 

 Local mean time 



Remarks 



Torsion weight suspended 8 min. 



Temp. 9 



Clear; northeast wind 



* Counted from South around by West from to 360. 



Summary Sheet of Results. 



* Enter L. M. T.'s to nearest minute; declination and inclination to nearest O'.l; intensity 

 to nearest 7 (.00001 C. G. S.). All references are to north end of magnet; east declinations and 

 north inclinations are counted as positive. 



