CONDITIONS INFLUENCING PREVALENCE 



227 



lation of 173 persons, only 8 were attacked with fever ; 

 whereas in 30 unprotected, having a population of 220, only 

 17 escaped the disease. 



In several instances the compared cottages are the same 

 building, unprotected in one year and protected in the 

 following, and it must be admitted that a much smaller 

 degree of success would warrant any reasonable person in 

 giving the plan a thorough trial. All the same, I know well 

 that what is comparatively easy in a small Italian cottage 

 will be by no means so easy in our rambling Indian bunga- 

 lows, with several doors to every room, and none of the 

 joinery made to fit with any approach to accuracy. House 



Fig. 37a. — Railway servant's cottage in the Roman Campagna, protected, 

 against the entry of Mosquitoes by Professor Celli's method. 



building is as excellent in Italy as it is bad in India, and the 

 careless finishing of most of our bungalows, especially of 

 the roofs, would make it extremely difficult to keep out so 

 importunate an intruder as the Indian Anopheles without 

 extensive structural alterations. Then, too, I can easily 

 picture how systematically Gunga Din and Nabbi Baksh 

 would " forget " and carefully prop open the spring doors to 

 save the trouble of shouldering them open ; but that might 

 be got over by a little drilling. In the type of bungalow 



