CHAPTER III 



GEOGRAPHY, METEOROLOGY, ETC., AND THEIR 

 BEARING ON THE PRESENCE OF AEDES CALOPUS 



'T'HE Canal Zone is a narrow strip of land ten 

 ■■■ miles wide and approximately forty-eight 

 miles long, situated entirely within the torrid zone. 

 Its northern boundary is in latitude 9° 24' 40" N. 

 (vicinity of Punta Mala Remo). Its southern- 

 most latitude is 8° 54' 40" N. (Pionta Bruja). 

 The seasons are well marked: a rainy season of 

 nearly eight months' duration and a dry season 

 of about four months, January to April. 



The mean annual temperature is approximately 

 80° F. 



The extreme range of temperature is between 

 68° and 97° P. 



The climate and temperature are favorable to 

 mosquito propagation the year round. 



In 1904 when the Canal Zone was ceded by the 

 Republic of Panama to the United States, it con- 

 tained a number of villages and small settlements; 



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