632 



TABLE II. Showing the comparison of the Ratios of the larger Dis- 

 turbances of the Declination at the different hours of local solar 

 time at Kew and Hobarton. 



For the convenience of those who prefer graphical illustration, I 

 have represented on an accompanying woodcut the results to which 

 I have referred. The curves drawn in unbroken black lines, in figures 

 1 and 2, show the phenomena at Kew j those in dotted lines in the 

 same figures, the phenomena at Hobarton. Fig. 1 presents westerly 

 disturbances at Kew, and easterly at Hobarton in comparison with 

 each other ; they are obviously allied phenomena. Fig. 2 presents 

 easterly disturbances at Kew and westerly at Hobarton ; these are 

 also, obviously, allied phenomena, but are as obviously governed by 

 distinct laws from those in fig. 1 . 



Had the phenomena at Kew and Hobarton been the only ones 

 known to us, we might have inferred that we had obtained the 

 characteristic forms of the diurnal variations due to the action of two 

 distinct and independent forces ; and we might have expected with 

 some degree of confidence to have found curves of corresponding 



