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The dumping-grounds should be situated as near as 

 possible, in order to save time in transit. The rubbish can 

 be most effectually used in filling up ponds and borrow- 

 pits ; otherwise it must be discharged at the municipal 

 dumping-ground. 



Dr. LOGAN TAYLOR and myself found, as the result of 

 our work in Sierra Leone, that a gang of six men can keep 

 one large mule-cart fully employed, and that on the average 

 it can clear fifty houses and remove ten cartloads of broken 

 vessels daily one cartload for every five houses. 



The head man must keep an account of all the houses 

 cleared by his gang, and also of the number of cartloads 

 removed. He must be extremely polite to all the inmates 

 of the houses especially to the older ladies. If, as some- 

 times, but rarely, happens, he comes to a house where the 

 owner forbids his entry, he should simply leave that house 

 alone (being, however, careful to record the address for 

 future reference), and go on to the next one. 



But the head man has also other duties to perform. In 

 every house he will find several tubs or pots of water stored 

 for use by the occupants, and in many of these he will find 

 crowds of Culex larvae. He should call attention to the 

 larvae, and endeavour to explain that they are the young of 

 mosquitoes. If he is not believed (which, so advanced is 

 education among the people, will generally be the case 

 even among certain classes of Europeans) he should place 

 a few larvae in a bottle half full of water, bunged with 

 paper, and tell the sceptics to keep them under observation 

 for a few days. He should then ask leave to pour out the 

 larvae remaining in the vessel in which they were originally 

 found, upon the ground, where they will speedily perish. 

 If, however, the water in the vessel is required by the 



