52 



useful in isolated buildings, such as travellers' rest-houses, 

 railway stations, and planters' houses ; while as regards 

 areas under government control, such as barracks, hospitals, 

 and gaols, or areas under the control of companies, such as 

 large plantations, mines, and so on, all the measures given 

 above can be undertaken simultaneously. 



It is not necessary to dilate further on these points. 

 The intelligent reader will be able to think out further 

 details for himself.* 



It is often stated that we should employ not one but all 

 possible measures. This is not practical advice, because 

 as a rule funds will not suffice for more than one measure. 

 Where they do, then, of course, we can render ourselves 

 doubly and trebly secure if we please. I think that if 

 funds permit, after we have started our mosquito brigades, 

 we should endeavour to add KOCH'S principle, and make 

 arrangements for supplying quinine to the people at 

 least for the prevention of malaria. The best way of doing 

 this would be to appoint street vendors of the drug. It is 

 possible that enough profit could be made in this way to 

 pay expenses. Then, again, rich people should be persuaded 

 to employ wire-gauze screens, and in the tropics mosquito- 

 nets, punkahs, and segregation should always be adopted 

 wherever practicable. The two former should on no account 

 be abandoned, however successful the operations against 

 mosquitoes may have been. Mosquito-nets will always ex- 

 clude, not only stray mosquitoes, but many other insects ; 

 and punkahs keep the body cool, comfortable, and vigorous. 



* Some of the schemes given above have been advocated by persons who 

 are not very familiar with the practice of tropical sanitation. In Italy screens 

 and quinine have been chiefly used ; but some writers forget that in the tropics 

 we are not called upon to deal with such civilised and intelligent people as live 

 in Italy. 



