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lanlic Ocean differ essentially in the pheno- 

 mena of climate. 1 In Europe the distribution 

 of heat through the seasons is more uniform, 

 and the medium of the year more elevated. 

 This equability is highly favourable to the 

 perfection of organized bodies ; hence the 

 vegetables of America are meliorated in the 

 corresponding latitude in Europe , while 

 many productions of Europe cannot exist 

 under the same parallel in America. 2 We are 

 obliged, also, to migrate in the train of the 

 Seasons in quest of an agreeable tempera- 

 ture, which the more favoured Europeans 

 enjoy without changing their native signs. 

 We experience , in the same latitude , the 

 summer of Rome, the winter of Copenhagen, 

 and the mean temperature of the coast of 

 Britany. Nor is this difference attributable to 

 the state of cultivation, nor to any acciden- 

 tal cause with which we are acquainted : in 



1 See De Humboldt's Memoir on the Distribution of 

 Heat. 



2 Yet vegetation is more vigorous and more varied in 

 the United States than in the same latitude in Europe. See 

 Be Humboldt's Vegetable Physiognomy, in his charming 

 work of the Pictures of Nature, 



