io8 DISEASES DUE TO PROTOZOA 



It should be kept in good repair. Each net will last one year in travel, 

 and about two years stationary. When the strands are becoming rotten 

 the nets should be destroyed. A net with small holes or not tucked 

 under the mattress is worse than not having one at all. 



(2) Portable mosquito-proof rooms could be used, and are extremely 

 useful for doing night work or reading in mosquito districts. They 

 are essential in some districts when one wishes to work in peace during 

 the daytime when flies are a pest. 



(3) Fixed mosquito-proof rooms can be used which are more stable 

 for permanent residence. Copper gauze wire can be used fixed to 

 timbers. Portable ones on frames are also made with copper wire, 

 but they are subject to much damage in constant transit. 



Some steamers trading between Liverpool and the Amazon are now- 

 screened against mosquitoes. The sea air may be injurious to the 

 copper gauze. 



(4) Mosquito proofing of windows and doors excludes flies, moths, 

 glare of the sun, damp exhalation after heavy tropical showers, and 

 allows the breeze to enter unimpeded. Mosquito wire is of tinned 

 iron, copper or brass, the prices being as two is to three. 



(5) Mosquito proofing of verandahs. This is more expensive, but 

 in selected cases gives good results. It obscures light and seems to 

 retain the heat. 



(6) Hands and feet can be protected by mosquito boots, gloves, &c. 



(7) Medicine. All exposed to mosquito bites should take 5 grains 

 of quinine daily. To keep off mosquitoes employ eucalyptus, petro- 

 leum, camphor bags about neck, &c. 



Natives like the mixture of "Camber-green oil," with which they 

 paint their bodies. It is made up of Citronella oil, i|; Kerosene, i ; 

 Cocoanut oil, 2. 



(8) Constant movement will prevent mosquitoes from settling nearly 

 as frequently as they otherwise would. 



(9) Fans and punkas. These creating a breeze are useful in houses 

 or on verandahs. They can be driven by hand or electricity. 



(B) MOSQUITO REDUCTION. 



(i) By killing adults in houses with a small hand net. 

 (2) Fumigation for the same purpose. This method is much used 

 in Italy and the States. Sulphur is generally used. 



^- Powdered sulphur, 2 lbs. per 1,000 cub. feet. 

 Moisten with methylated spirits. 

 Place in shallow pan, supported on brick, in a large flat basin of 



water in a sealed room. 

 Leave for three hours after ignited, and then ventilate room well. 



Pyrethrum powder may also be used, 3 lbs. per 1,000 cub. ft. 

 Sulphur affects brass work and steel goods. 



