HOW TO FUMIGATE 177 



fumigation and the mosquitos so gatliered up should 

 be burned, as pyrethruni powder merely stuns the 

 mosquito. The amount of pyrethruin to be used is 

 one poimd to each ordinary-sized room. 



It having been decided to call in experts to advise 

 upon the situation and if possible to expedite the 

 campaign, the special yellow fever experts arrived 

 and took charge of the situation, and the campaign 

 was carried out with renewed energy and precision. 

 It consisted in : — 



1. Discovering every case of yellow fever and 

 isolating it. 



2. Kilhng all stegomyias. 



3. General warfare against all mosquitos, except 

 swamp. 



4. Ensuring that each Ward was fully equipped with 

 its forces of inspectors, oilers, screeners, fumigators and 

 others as wanted, and that there was an adequate number 

 of men. 



Each Ward Office was in telephonic communication 

 with the Central Office. 



Under the ^larine Hospital Surgeon in each Ward 

 were placed one or more medical assistants, young local 

 medical men, chosen on account of their local know- 

 ledge and ability, and a staff of workmen, varying 

 from 28 to 128. 



Each Ward Centre was furnished with a supply 

 of— 



Fumigating Materials. — Sulphur, pyrethrum, pots 



12 



