THE PENRYN CRUSADE 99 



Board serve without pay. After the district is estab- 

 lished, the Sanitary Assessor estimates the value of 

 the assessable property within the district and the 

 tax necessary to pay for the work required. The Sani- 

 tary Board directs the work, and engages the neces- 

 sary assistance to carry it forward. It is important 

 that some professional man especially prepared by 

 education and experience should be placed in charge 

 of the work. 



Results Accomplished. — It is not possible to entirely 

 eliminate malaria from a community in a single season, 

 or even in several seasons. Even under the most favor- 

 able conditions of construction of all necessary improve- 

 ments, oiling where temporarily necessary during such 

 construction, rigid sanitary inspection and control, 

 and medical treatment and protection of all cases of 

 malaria, cases of long standing may suffer relapse. 

 Malaria is a disease which may remain latent in the 

 system for a long time after the subsidence of the 

 original infection and attack of fever, and then appear 

 on exposure or overexertion, and entirely without fresh 

 inoculation by the bite of an infected Anopheline 

 mosquito. This is especially true in the case of adults. 

 Children, while subject to attacks of greater severity 

 than adults, recover generally more quickly, due to 

 their greater physiological elasticity, and are less sub- 

 ject to relapses. In addition a parent will usually 

 call in medical attendance for a case of malaria in his 

 child, and to save the expense will neglect proper 



