622 SCIENCE PROGRESS 



flow than some cosmic one ; and variations in the intensity 

 of solar radiation seem to be an extremely probable cause. On 

 the other hand, it is just in such events as the variations in the 

 intensity of the Gulf Stream flow that one would seek for the 

 manifestations of variations in the intensity of solar radiation. 

 The current in northern latitudes is an extremely stable one, 

 and we can hardly imagine it to vary except under the impress 

 of some powerful force ; while such variations as would be 

 produced would be likely to be well marked, and would persist 

 for some time. 



