376 A. D. Bache on the Horizonial Component of Magnetic For 



Table No. IV. 





+o64 +o48 -t 



!+o3B +o6«i+o83 

 067!+! 1 3 

 o5o+o8i 



::4?::; 



127-012 |+o33 +o48|+o48 1+094 ;+ 1 2 5 +o48 



^ !^^ 1+^5!+^ 1+^+^7 1+75 5 +^ 

 114+0261+034 +057+082 +125 +1 571+053 . 

 «4 +042 +056+086,1+,,, +.29+152+114 



.2o6!-??8!-o44| 



! +o4o +o85|+09o +o53 



0-00194 in absolute measure. About Hi a. m. there is an epocu 

 of no variation. At 2 p. m. a second maximum, about 0-UUiO( 

 is reached. At 7i and 11 p. m. points of no change are reacnea. 

 To find the turning epochs of the annual variation, tn« 

 monthly values for the hours of 9 A. M. and 2 P. M. when oes 

 developed were taken from table Is"o. IV. and again compareu 

 with the annual mean as in the following table. 



Table No. Y.- Annual variation at the hours 0/ 9 a. m. and 2 p. m. compared v^C" 









■■^PM. 



Dui: 



Meandjffer. 





0-00 



-~^ 





000 



-T^' 



January. 



-025 





-081 





t^ 



+,5o 



-^ 



-"045 



:o45 



April,' 



-193 









-o>6 







-069 





^069 



'11 



















-098 

































rr>;er 



i;;^^ 











December, 



+037 











feZI 



— 4,- 





~r_ 







