observed at Sea in the Cable-ship " Ducid " 253 



It was not till long after the publication of my letter that a 

 causal connexion was claimed between the remarkable sunsets 

 of the Atlantic and the antecedent eruption of Krakatoa. 



Admitting the existence of the cloud of fine volcanic dust in 

 the higher regions of the atmosphere, postulated by the authors 

 of this theory, it is difficult to account for the nature of the 

 influence which made the rays of the rising sun differ so markedly 

 from those of the setting sun in their behaviour when they en- 

 countered it. 



