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



V. Secular Variation of Declination — continued. 



17 



Place. 



Observer. 



Date. 



Declination 

 west. 



1 J-J-«) iJ c 



per 

 annum. 









Cailliand. 



1819 



o 



12 





















J-OOJ 



5 



13 



2 



— 6 "1 







K.Gf.L. 



1895 



4 



26 







-4-7 











11 



13 









Af Tmnic fi 



AU JLUHlctS), vJ 

















kilonis. up- 

















stream 





H.Gr.L. 



. 1895 



4 



38 







-5-2 







Cailliand. 



1819 



11 



30 













H.Gr.L. 



1895 



4 



40 







-5 -4 





Mirgissi (Amka) . . 



Cailliand. 



1819 



13 













At Sarras, 20 















kiloms. south 





H.Gr.L. 



1895 



4 



53 







1 



-6-2 





The magnetic bearing of the walls or axes of certain temples is 

 given in the " Description de l'Egypte," and from these an approximate 

 value for the secular change in the declination may be deduced. 



On Philse— 



Magnetic 



bearing, True Declination, 



1799. bearing. 1799. 



Great Isis Temple 44° E. of IS T . 32° 5' E. of K 11° 55' 



Nectanebo's Temple 25° „ 13° 28' „ 11° 32' 



The Kiosk (or Pharaoh's 



Bed) 104° 30',, 93° 25' „ 11° 5' 



Mean 11° 31' 



The Declination in 1896 was 4° 23' W.. which gives an average 

 annual decrease of 4'*4. 

 Kom Ombo Temple- 

 Magnetic bearing of axis, 1799 55° E. of If. 



„ 1892...... 43° 55' 



Change in 93 years 11° 5' 



,, per annum , • 7'"2 



Edfu Temple- 

 Magnetic bearing of axis, 1799 15° E. of H". 



1892 3° 10' 



Change in 93 years 11° 50' 



„ per annum 7''7 



VOL. LX £1. 



C 



