120 On the Daily Range of Magnetic Declination. [Mar. 22, 



The results of this paper appear to be consistent with such an hypo- 

 thesis when so modified. 



21. It is needless here to enter into the various reasons which induce us 

 to believe in the existence of a connexion between the meteorology of the 

 earth and the physical state of the sun's surface. I may, however, refer to a 

 paper " On the Daily Bange of Atmospheric Temperature at the Kew. Ob- 

 servatory" (Proc. Boy. Soc. 1877, vol. xxv. p. 580), in which it to*s shown 

 that at Kew the temperature-range is somewhat higher at times of maximum 

 than at times of minimum sun-spots. If, however, we plot as a curve this 

 temperature-range, it is neither like Fig. I. nor Kg. II., or at least not so 

 like as to suggest any marked relation to the eye. (This curve is not given 

 in this paper .) But on examining its most prominent points, I find that 

 not a few of these agree both in direction and in time with similar pecu- 

 liarities in the magnetic curve. Thus there is a well-marked prominence 

 in the temperature-range curve corresponding to about the end of May 

 1861 ; now there is a prominence in the magnetic curve at about the same 

 date. Again, there is a depression in both curves corresponding to about 

 the end of May 1862. Again, there is a well-marked depression in the 

 temperature-curve corresponding to the end of April 1866, while in the 



