260 WRITINGS OF JOSEPH HENRY. [1846 



ON THE HEIGHT OF THE AURORA. 



(Proceedings of the American Philosophical Society, vol. iv, p. 370.) 



December Zd, 1846. 



Professor Henry made a communication relative to some 

 observations on the aurora borealis, with the object of deter- 

 mining the height of the meteor. The result of the observa- 

 tions tended to establish the fact that the arch of the aurora 

 like the rainbow is a local phenomenon, each observer seeing 

 a different object. 



