ITS DISEASES METEOROLOGICAL OBSERVATIONS AT. 187 



spersed with marshes, — which bound the Gulf of Mexico. Its 

 unhealthiness is proverbial. From the month of May to that of 

 November, — comprising the usual period during which the north- 

 ers cease blowing, — the vomito prieto, or black vomit, prevails 

 incessantly at Vera Cruz. None but natives of the town, or accli- 

 mated foreigners, are free from its attacks, and the frightful inroads 

 it made among our troops, in the year 1847, will long be remem- 

 bered in the history of our army and country. Time does not appear 

 to have had any effect on this dreadful disease. Increase of popu- 

 lation and sanatory precautions do not seem to abate its malignity ; 

 and the science of the ablest physicians is entirely at fault in deal- 

 ing with it. Diarrhoea, dysentery and vomito are the most fatal 

 and prevalent maladies at Vera Cruz ; and, the latter disease, is 

 reckoned to cause one-sixth of the whole mortality of the port. 



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