of Terrestrial Magnetism. 



107 



PL I. Mean Diurnal Disturbance- Variation : Deviation. 

 Figs. 1 and 2. Kew and Hobarton. Fig. 3. Nertchinsk. 



Local Astronomical Hours. 



18 19 20 21 22 23 1 2 3 4 5 6 7 8 



I I I l ■ i I I 1 I ,J I I L. 



9 10 11 12 13 14 15 16 17 18 



_i i i i i ''■■ 



Ratios. 



i 



lo 



10 



0-5- 



Fig. 1. West Deflections. 



Kew, North End. 



Hobarton, South End. 



2-0- 



1-5 



Fig. 2. East Deflections. 

 Kew, North End. 

 - — Hobarton, South End 



1-0 



0-5 



-I 1 r 



t 1 1 1 1 1 1 i 1 r 



18 19 20 21 22 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 



Local Astronomical Hours. 



Local Astronomical Hours. 



6 7 8 9 10 11 12 13 14 15 16 17 IS 19 20 21 22 23 1 2 3 4 5 6 



■■I 1 i ! 1 I I i I - I ! i ' ■ . i ' 



2-0 



Fig. 3. West Deflections 



Nertehinsk 

 (North End) 



1 ■ " | ■ - T " ' - 1 — — nr » - — ■> ' ■ ■ - — ■ — ■ — — — »■■ — ' ■ i » T " ' "" ** " " 1 " — ■ ' "' ' 



6 7 8 9 10 11 12 13 14 15 16 17 IS 19 20 21 22 23 1 2 3 4 5 6 



Local Astronomical Hours. 



