Sun-spots and Phenology

Abstract

IT can be shown in several ways, I think, that we have, on the whole, in these parts (London), more warmth when the sun-spots are numerous than when they are few, a state of things rather opposite to that in the tropics, where (according to M. Nordmann, who has lately confirmed the work of Dr. Köppen some thirty years ago) sun-spots mean coolness, and there is most warmth about minima.