1901.] Magnetic Observations in Egypt, 1893—1901. 



13 



Diurnal Variation of Declination at Philce, Assuan. 



Lat. N. 24° V 10" ; Long. E. 32° 51' 50", from December, 1895, to 



April, 1896. 



While employed on Philae Island examining and restoring the 

 ancient buildings on the island, magnetic observations in the neigh- 

 bouring country could not be undertaken for want of time. A 

 magnetometer was set up, therefore, in a small, empty chamber on the 

 roof of the Great Isis Temple, and the declination observed hourly 

 from 7 A.M. to 5 P.M., except when the work on the excavations pre- 

 vented. The results are given in the following tables (see also p. 12) : — 



December, 1895. 



1 



Hours. 



20. 



21. 



22. 



23. 



24. 



25. 



26. 



27. 



28. 



29. 



30. 



31. 



7 





26-9 







26-0 



26-4 



26-4 



25-7 





2G-0 





25 5 



26 -8 



26-2 



8 



24 -6 











25-9 



25-5 





24 -4 





24-4 



24 8 





9 



24-1 



25 -1 



25 -3 



25-9 



25 -9 



26-8 



24-8 



23-7 





24 -8 



27 -8 



25-0 



10 



24-6 



24 -8 



24 -6 



27-6 







27-1 



25 



GO 



26 -6 







11 



25-1 



25 -0 





29-6 



28-0 



29-3 



27 -8 



25-2 



P 



o 

 '-3 



27-7 



27-8 



28-4 



Noon 



25-1 





26-0 



29 -4 



28 -2 



28-8 



27-0 



24-1 



> 



1/ 



27 '5 





28 -6 



! : 





24'6 













23 -7 



sqo o 











24-6 



25 -1 



24 -8 



27 -7 



26-0 



26-4 



26-2 







26-2 





27-7 



3 



24-6 







25 -8 



24 -2 



26-0 



25-7 



23-7 





26 -6 



27-7 



28 1 



4 



26 -9 



24-6 





25-5 









25 -7 



24-6 





26-8 



_. 



28 -1. 



5 



26 7 



25-8 



24. -6 



26-2 



24-4 











26-9 



26-8 



27-9 



(See folding tables for months of January, February and March. V 



