The Campaign in Havana 239 



The reports were read at a glance, and rapidly 

 transferred in the office to the house card show- 

 ing the names of owner and tenant, with dates 

 showing when mosquito larvse were found, and 

 in what class of containers. These reports were 

 of great use, in showing progress made in Aedes 

 calopus control and preventing the continuance 

 of mosquito propagation, besides furnishing valid 

 evidence in courts adjudging fines. 



A system of checking the daily inspection was 

 employed. Each day a trustworthy man made an 

 independent inspection of several houses in every 

 district, both before and following the visit of the 

 district inspector. It was thus known to the 

 office, beforehand, what the district inspector 

 should find and report as well as whether several 

 reports of the previous day's work were reason- 

 ably correct. In the early stages of the campaign 

 this checking was very useful, and kept the in- 

 spectors up to the mark. Later, however, the 

 inspectors worked more thoroughly, and the 

 preinspections and reinspections seldom differed 

 from the district inspectors' reports. In addition, 

 the inspectors were transferred from one district 

 to another at irregular intervals, and thus a check 

 was obtained, and the force kept very much alive. 

 The chief sanitary officer and his assistant made 



