408 On the Suns Surface and the Earth's Magnetism. [Dec. 21, 



Table I. — Horizontal Force Maxima. 



Horizontal force = a constant quantity plus 

 the following expression, the unit being 



one hundred-thousandth of the whole Spotted area in mulionths of the 



horizontal force, increasing numbers de- sun's visible hemisphere, 



noting increasing force. 



(1) (2) (3) (4) (5) .. (1) (2) (3) (4) (5; 

 311 -1 321 -6 339 '5 316 '5 303 S . . 341 354 356 305 284 



Table II. — Horizontal Force Minima (units as above.) 



(1) (2) (3) (4) (5) (1) (2) (3) (4) (5; 

 322 '6 306 '4 275 6 298 1 309 *8 . . 310 253 267 271 284 



7. It will at once be seen from these results that high values of the 

 horizontal force correspond to large sun-spot areas, and low values to 

 small sun-spot areas. Thus the mean value of the horizontal force for 

 the first or maximum series is 318'4, while for the second or minimum 



340 

 1330 



7 





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