756 COSMICAL PHYSICS 



Calculations appear to show that in the regions above the earth 

 there exists a magnetic field the exact counterpart of that of the earth 

 itself. The precise manner in which this has been brought about is one 

 of the great problems. The composition of this field is revealed to us 

 by the variations in the magnetic elements during the earth's rota- 

 tion and by the analysis of the earth's permanent magnetic field. 



Had we time, we might speak of the association between certain 

 magnetic and meteorological phenomena; however, this field is cov- 

 ered in Professor Arrhenius's address. 



In conclusion, let me say then that if it be conceded that the study 

 of the physics of the universe is primarily concerned with the un- 

 raveling of the bonds of union between the constituent bodies of the 

 universe, and with the interchange of minute electrified particles 

 between them, and inasmuch as it appears that magnetic and electric 

 variations constitute the surest and most sensitive indications of 

 these existing bonds and mutual interchanges, it behooves all those 

 interested in the steady development of the sciences of the universe 

 to accord to the subjects of terrestrial magnetism and terrestrial 

 electricity the fullest possible recognition, and thus give the patient 

 workers in these fields the stimulus and encouragement necessary for 

 best work in any field of human inquiry. 



SHORT PAPER 



PROFESSOR H. H. CLAYTON, of Blue Hill Observatory, presented a paper to 

 this Section on " The Circulation of the Atmosphere." 



